* [PATCH v19 01/18] dt: bindings: Add multicolor class dt bindings documention
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
@ 2020-04-02 20:42 ` Dan Murphy
2020-04-06 20:12 ` Pavel Machek
2020-04-02 20:42 ` [PATCH v19 02/18] dt-bindings: leds: Add multicolor ID to the color ID list Dan Murphy
` (16 subsequent siblings)
17 siblings, 1 reply; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:42 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Add DT bindings for the LEDs multicolor class framework.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
.../bindings/leds/leds-class-multicolor.txt | 98 +++++++++++++++++++
1 file changed, 98 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/leds-class-multicolor.txt
diff --git a/Documentation/devicetree/bindings/leds/leds-class-multicolor.txt b/Documentation/devicetree/bindings/leds/leds-class-multicolor.txt
new file mode 100644
index 000000000000..4b1bd82f2a42
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-class-multicolor.txt
@@ -0,0 +1,98 @@
+* Multicolor LED properties
+
+Bindings for multi color LEDs show how to describe current outputs of
+either integrated multi-color LED elements (like RGB, RGBW, RGBWA-UV
+etc.) or standalone LEDs, to achieve logically grouped multi-color LED
+modules. This is achieved by adding multi-led nodes layer to the
+monochrome LED bindings.
+
+The nodes and properties defined in this document are unique to the multicolor
+LED class. Common LED nodes and properties are inherited from the common.txt
+within this documentation directory.
+
+Required LED child properties:
+ - color : For multicolor LED support this property should be defined as
+ LED_COLOR_ID_MULTI and further definition can be found in
+ include/linux/leds/common.h.
+
+led-controller@30 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "ti,lp5024";
+ reg = <0x29>;
+
+ multi-led@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+ color = <LED_COLOR_ID_MULTI>;
+ function = LED_FUNCTION_CHARGING;
+
+
+ led@3 {
+ reg = <3>;
+ color = <LED_COLOR_ID_RED>;
+ };
+
+ led@4 {
+ reg = <4>;
+ color = <LED_COLOR_ID_GREEN>;
+ };
+
+ led@5 {
+ reg = <5>;
+ color = <LED_COLOR_ID_BLUE>;
+ };
+ };
+
+ multi-led@2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ color = <LED_COLOR_ID_MULTI>;
+ function = LED_FUNCTION_ACTIVITY;
+ reg = <2>;
+ ti,led-bank = <2 3 5>;
+
+ led@6 {
+ reg = <0x6>;
+ color = <LED_COLOR_ID_RED>;
+ led-sources = <6 9 15>;
+ };
+
+ led@7 {
+ reg = <0x7>;
+ color = <LED_COLOR_ID_GREEN>;
+ led-sources = <7 10 16>;
+ };
+
+ led@8 {
+ reg = <0x8>;
+ color = <LED_COLOR_ID_BLUE>;
+ led-sources = <8 11 17>;
+ };
+ };
+
+ multi-led@4 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <4>;
+ color = <LED_COLOR_ID_MULTI>;
+ function = LED_FUNCTION_ACTIVITY;
+
+ led@12 {
+ reg = <12>;
+ color = <LED_COLOR_ID_RED>;
+ };
+
+ led@13 {
+ reg = <13>;
+ color = <LED_COLOR_ID_GREEN>;
+ };
+
+ led@14 {
+ reg = <14>;
+ color = <LED_COLOR_ID_BLUE>;
+ };
+ };
+
+};
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 02/18] dt-bindings: leds: Add multicolor ID to the color ID list
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
2020-04-02 20:42 ` [PATCH v19 01/18] dt: bindings: Add multicolor class dt bindings documention Dan Murphy
@ 2020-04-02 20:42 ` Dan Murphy
2020-04-02 20:42 ` [PATCH v19 03/18] " Dan Murphy
` (15 subsequent siblings)
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:42 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Add a new color ID that is declared as MULTICOLOR as with the
multicolor framework declaring a definitive color is not accurate
as the node can contain multiple colors.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
include/dt-bindings/leds/common.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/dt-bindings/leds/common.h b/include/dt-bindings/leds/common.h
index 9e1256a7c1bf..7006d15f71e8 100644
--- a/include/dt-bindings/leds/common.h
+++ b/include/dt-bindings/leds/common.h
@@ -29,7 +29,8 @@
#define LED_COLOR_ID_VIOLET 5
#define LED_COLOR_ID_YELLOW 6
#define LED_COLOR_ID_IR 7
-#define LED_COLOR_ID_MAX 8
+#define LED_COLOR_ID_MULTI 8
+#define LED_COLOR_ID_MAX 9
/* Standard LED functions */
#define LED_FUNCTION_ACTIVITY "activity"
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 03/18] leds: Add multicolor ID to the color ID list
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
2020-04-02 20:42 ` [PATCH v19 01/18] dt: bindings: Add multicolor class dt bindings documention Dan Murphy
2020-04-02 20:42 ` [PATCH v19 02/18] dt-bindings: leds: Add multicolor ID to the color ID list Dan Murphy
@ 2020-04-02 20:42 ` Dan Murphy
2020-04-06 20:13 ` Pavel Machek
2020-04-02 20:42 ` [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition Dan Murphy
` (14 subsequent siblings)
17 siblings, 1 reply; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:42 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Add a new color ID that is declared as MULTICOLOR as with the
multicolor framework declaring a definitive color is not accurate
as the node can contain multiple colors.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
drivers/leds/led-core.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c
index f1f718dbe0f8..846248a0693d 100644
--- a/drivers/leds/led-core.c
+++ b/drivers/leds/led-core.c
@@ -34,6 +34,7 @@ const char * const led_colors[LED_COLOR_ID_MAX] = {
[LED_COLOR_ID_VIOLET] = "violet",
[LED_COLOR_ID_YELLOW] = "yellow",
[LED_COLOR_ID_IR] = "ir",
+ [LED_COLOR_ID_MULTI] = "multicolor",
};
EXPORT_SYMBOL_GPL(led_colors);
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* Re: [PATCH v19 03/18] leds: Add multicolor ID to the color ID list
2020-04-02 20:42 ` [PATCH v19 03/18] " Dan Murphy
@ 2020-04-06 20:13 ` Pavel Machek
2020-04-14 13:21 ` Dan Murphy
0 siblings, 1 reply; 36+ messages in thread
From: Pavel Machek @ 2020-04-06 20:13 UTC (permalink / raw)
To: Dan Murphy; +Cc: jacek.anaszewski, linux-leds, linux-kernel
On Thu 2020-04-02 15:42:56, Dan Murphy wrote:
> Add a new color ID that is declared as MULTICOLOR as with the
> multicolor framework declaring a definitive color is not accurate
> as the node can contain multiple colors.
>
> Signed-off-by: Dan Murphy <dmurphy@ti.com>
Squash with previous patch, ack for both, they can't be separate.
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 36+ messages in thread
* Re: [PATCH v19 03/18] leds: Add multicolor ID to the color ID list
2020-04-06 20:13 ` Pavel Machek
@ 2020-04-14 13:21 ` Dan Murphy
0 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-14 13:21 UTC (permalink / raw)
To: Pavel Machek; +Cc: jacek.anaszewski, linux-leds, linux-kernel
Pavel
On 4/6/20 3:13 PM, Pavel Machek wrote:
> On Thu 2020-04-02 15:42:56, Dan Murphy wrote:
>> Add a new color ID that is declared as MULTICOLOR as with the
>> multicolor framework declaring a definitive color is not accurate
>> as the node can contain multiple colors.
>>
>> Signed-off-by: Dan Murphy <dmurphy@ti.com>
> Squash with previous patch, ack for both, they can't be separate.
>
Ack
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (2 preceding siblings ...)
2020-04-02 20:42 ` [PATCH v19 03/18] " Dan Murphy
@ 2020-04-02 20:42 ` Dan Murphy
2020-04-03 3:47 ` Randy Dunlap
` (5 more replies)
2020-04-02 20:42 ` [PATCH v19 05/18] dt: bindings: lp50xx: Introduce the lp50xx family of RGB drivers Dan Murphy
` (13 subsequent siblings)
17 siblings, 6 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:42 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Introduce a multicolor class that groups colored LEDs
within a LED node.
The multi color class groups monochrome LEDs and allows controlling two
aspects of the final combined color: hue and lightness. The former is
controlled via <color>_intensity files and the latter is controlled
via brightness file.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
.../ABI/testing/sysfs-class-led-multicolor | 42 ++++
Documentation/leds/index.rst | 1 +
Documentation/leds/leds-class-multicolor.rst | 95 ++++++++
drivers/leds/Kconfig | 10 +
drivers/leds/Makefile | 1 +
drivers/leds/led-class-multicolor.c | 206 ++++++++++++++++++
include/linux/led-class-multicolor.h | 121 ++++++++++
7 files changed, 476 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-class-led-multicolor
create mode 100644 Documentation/leds/leds-class-multicolor.rst
create mode 100644 drivers/leds/led-class-multicolor.c
create mode 100644 include/linux/led-class-multicolor.h
diff --git a/Documentation/ABI/testing/sysfs-class-led-multicolor b/Documentation/ABI/testing/sysfs-class-led-multicolor
new file mode 100644
index 000000000000..1f50324d24fd
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-led-multicolor
@@ -0,0 +1,42 @@
+What: /sys/class/leds/<led>/brightness
+Date: March 2020
+KernelVersion: 5.8
+Contact: Dan Murphy <dmurphy@ti.com>
+Description: read/write
+ Writing to this file will update all LEDs within the group to a
+ calculated percentage of what each color LED intensity is set
+ to. The percentage is calculated for each grouped LED via the
+ equation below:
+
+ led_brightness = brightness * color_intensity/max_brightness
+
+ For additional details please refer to
+ Documentation/leds/leds-class-multicolor.rst.
+
+ The value of the color is from 0 to
+ /sys/class/leds/<led>/max_brightness.
+
+What: /sys/class/leds/<led>/color_index
+Date: March 2020
+KernelVersion: 5.8
+Contact: Dan Murphy <dmurphy@ti.com>
+Description: read
+ The color_index array, when read, will output the LED colors
+ by name as they are indexed in the color_intensity array.
+
+What: /sys/class/leds/<led>/num_colors
+Date: March 2020
+KernelVersion: 5.8
+Contact: Dan Murphy <dmurphy@ti.com>
+Description: read
+ The num_colors indicates the number of LEDs defined in the
+ color_intensity and color_index arrays.
+
+What: /sys/class/leds/<led>/color_intensity
+Date: March 2020
+KernelVersion: 5.8
+Contact: Dan Murphy <dmurphy@ti.com>
+Description: read/write
+ Intensity level for the LED color within the array.
+ The intensities for each color must be entered based on the
+ color_index array.
diff --git a/Documentation/leds/index.rst b/Documentation/leds/index.rst
index 060f4e485897..bc70c6aa7138 100644
--- a/Documentation/leds/index.rst
+++ b/Documentation/leds/index.rst
@@ -9,6 +9,7 @@ LEDs
leds-class
leds-class-flash
+ leds-class-multicolor
ledtrig-oneshot
ledtrig-transient
ledtrig-usbport
diff --git a/Documentation/leds/leds-class-multicolor.rst b/Documentation/leds/leds-class-multicolor.rst
new file mode 100644
index 000000000000..5bb004999248
--- /dev/null
+++ b/Documentation/leds/leds-class-multicolor.rst
@@ -0,0 +1,95 @@
+====================================
+Multi Color LED handling under Linux
+====================================
+
+Description
+===========
+The multi color class groups monochrome LEDs and allows controlling two
+aspects of the final combined color: hue and lightness. The former is
+controlled via the color_intensity array file and the latter is controlled
+via brightness file.
+
+For more details on hue and lightness notions please refer to
+https://en.wikipedia.org/wiki/CIECAM02.
+
+Multicolor Class Control
+========================
+The multicolor class presents files that groups the colors as indexes in an
+array. These files are children under the LED parent node created by the
+led_class framework. The led_class framework is documented in led-class.rst
+within this documentation directory.
+
+Each colored LED will be indexed under the color_* files. The order of the
+colors are arbitrary the color_index file can be read to determine the color
+to index value.
+
+The color_index file is an array that contains the string list of the colors as
+they are defined in each color_* array file.
+
+The color_intensity is an array that can be read or written to for the
+individual color intensities. All elements within this array must be written in
+order for the color LED intensities to be updated.
+
+The color_max_intensity is an array that can be read to indicate each color LED
+maximum intensity value.
+
+The num_color_leds file returns the total number of color LEDs that are
+presented in each color_* array.
+
+Directory Layout Example
+========================
+root:/sys/class/leds/multicolor:status# ls -lR
+-rw-r--r-- 1 root root 4096 Oct 19 16:16 brightness
+-r--r--r-- 1 root root 4096 Oct 19 16:16 color_index
+-rw-r--r-- 1 root root 4096 Oct 19 16:16 color_intensity
+-r--r--r-- 1 root root 4096 Oct 19 16:16 num_color_leds
+
+Multicolor Class Brightness Control
+===================================
+The multiclor class framework will calculate each monochrome LEDs intensity.
+
+The brightness level for each LED is calculated based on the color LED
+intensity setting divided by the parent max_brightness setting multiplied by
+the requested brightness.
+
+led_brightness = brightness * color_intensity/max_brightness
+
+Example:
+A user first writes the color_intensity file with the brightness levels
+that for each LED that is necessary to achieve a blueish violet output from a
+RGB LED group.
+
+cat /sys/class/leds/multicolor:status/color_index
+green blue red
+
+echo 43 226 138 > /sys/class/leds/multicolor:status/color_intensity
+
+red -
+ intensity = 138
+ max_brightness = 255
+green -
+ intensity = 43
+ max_brightness = 255
+blue -
+ intensity = 226
+ max_brightness = 255
+
+The user can control the brightness of that RGB group by writing the parent
+'brightness' control. Assuming a parent max_brightness of 255 the user may want
+to dim the LED color group to half. The user would write a value of 128 to the
+parent brightness file then the values written to each LED will be adjusted
+base on this value
+
+cat /sys/class/leds/multicolor:status/max_brightness
+255
+echo 128 > /sys/class/leds/multicolor:status/brightness
+
+adjusted_red_value = 128 * 138/255 = 69
+adjusted_green_value = 128 * 43/255 = 21
+adjusted_blue_value = 128 * 226/255 = 113
+
+Reading the parent brightness file will return the current brightness value of
+the color LED group.
+
+cat /sys/class/leds/multicolor:status/brightness
+128
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index d82f1dea3711..2e4611b25054 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -30,6 +30,16 @@ config LEDS_CLASS_FLASH
for the flash related features of a LED device. It can be built
as a module.
+config LEDS_CLASS_MULTI_COLOR
+ tristate "LED Multi Color LED Class Support"
+ depends on LEDS_CLASS
+ help
+ This option enables the multicolor LED sysfs class in /sys/class/leds.
+ It wraps LED class and adds multicolor LED specific sysfs attributes
+ and kernel internal API to it. You'll need this to provide support
+ for multicolor LEDs that are grouped together. This class is not
+ intended for single color LEDs. It can be built as a module.
+
config LEDS_BRIGHTNESS_HW_CHANGED
bool "LED Class brightness_hw_changed attribute support"
depends on LEDS_CLASS
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index d7e1107753fb..310b5518783a 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -4,6 +4,7 @@
obj-$(CONFIG_NEW_LEDS) += led-core.o
obj-$(CONFIG_LEDS_CLASS) += led-class.o
obj-$(CONFIG_LEDS_CLASS_FLASH) += led-class-flash.o
+obj-$(CONFIG_LEDS_CLASS_MULTI_COLOR) += led-class-multicolor.o
obj-$(CONFIG_LEDS_TRIGGERS) += led-triggers.o
# LED Platform Drivers
diff --git a/drivers/leds/led-class-multicolor.c b/drivers/leds/led-class-multicolor.c
new file mode 100644
index 000000000000..838b1d679647
--- /dev/null
+++ b/drivers/leds/led-class-multicolor.c
@@ -0,0 +1,206 @@
+// SPDX-License-Identifier: GPL-2.0
+// LED Multi Color class interface
+// Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/
+// Author: Dan Murphy <dmurphy@ti.com>
+
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+
+#include "leds.h"
+
+int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev *led_cdev = &mcled_cdev->led_cdev;
+ int i;
+
+ for (i = 0; i < mcled_cdev->num_colors; i++)
+ mcled_cdev->multicolor_info[i].color_brightness = (brightness *
+ mcled_cdev->multicolor_info[i].color_led_intensity /
+ led_cdev->max_brightness);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(led_mc_calc_color_components);
+
+static ssize_t color_intensity_store(struct device *dev,
+ struct device_attribute *intensity_attr,
+ const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
+ int nrchars, offset = 0;
+ int intensity_value[LED_COLOR_ID_MAX];
+ int i;
+ ssize_t ret;
+
+ mutex_lock(&led_cdev->led_access);
+
+ for (i = 0; i < mcled_cdev->num_colors; i++) {
+ ret = sscanf(buf + offset, "%i%n",
+ &intensity_value[i], &nrchars);
+ if (ret != 1) {
+ dev_err(led_cdev->dev,
+ "Incorrect number of LEDs expected %i values intensity was not applied\n",
+ mcled_cdev->num_colors);
+ goto err_out;
+ }
+ offset += nrchars;
+ }
+
+ for (i = 0; i < mcled_cdev->num_colors; i++)
+ mcled_cdev->multicolor_info[i].color_led_intensity =
+ intensity_value[i];
+
+ led_set_brightness(led_cdev, led_cdev->brightness);
+err_out:
+ ret = size;
+ mutex_unlock(&led_cdev->led_access);
+ return ret;
+}
+
+static ssize_t color_intensity_show(struct device *dev,
+ struct device_attribute *intensity_attr,
+ char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
+ int len = 0;
+ int i;
+
+ for (i = 0; i < mcled_cdev->num_colors; i++)
+ len += sprintf(buf + len, "%d ",
+ mcled_cdev->multicolor_info[i].color_led_intensity);
+
+ len += sprintf(buf + len, "%s", "\n");
+
+ return len;
+}
+static DEVICE_ATTR_RW(color_intensity);
+
+static ssize_t color_index_show(struct device *dev,
+ struct device_attribute *color_index_attr,
+ char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
+ int len = 0;
+ int index;
+ int i;
+
+ for (i = 0; i < mcled_cdev->num_colors; i++) {
+ index = mcled_cdev->multicolor_info[i].color_index;
+ len += sprintf(buf + len, "%s ", led_colors[index]);
+ }
+
+ len += sprintf(buf + len, "%s", "\n");
+
+ return len;
+}
+static DEVICE_ATTR_RO(color_index);
+
+static ssize_t num_colors_show(struct device *dev,
+ struct device_attribute *max_intensity_attr,
+ char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
+
+ return sprintf(buf, "%d\n", mcled_cdev->num_colors);
+}
+static DEVICE_ATTR_RO(num_colors);
+
+static struct attribute *led_multicolor_attrs[] = {
+ &dev_attr_color_intensity.attr,
+ &dev_attr_color_index.attr,
+ &dev_attr_num_colors.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(led_multicolor);
+
+int led_classdev_multicolor_register_ext(struct device *parent,
+ struct led_classdev_mc *mcled_cdev,
+ struct led_init_data *init_data)
+{
+ struct led_classdev *led_cdev;
+
+ if (!mcled_cdev)
+ return -EINVAL;
+
+ if (!mcled_cdev->num_colors)
+ return -EINVAL;
+
+ led_cdev = &mcled_cdev->led_cdev;
+ mcled_cdev->led_cdev.groups = led_multicolor_groups;
+
+ return led_classdev_register_ext(parent, led_cdev, init_data);
+}
+EXPORT_SYMBOL_GPL(led_classdev_multicolor_register_ext);
+
+void led_classdev_multicolor_unregister(struct led_classdev_mc *mcled_cdev)
+{
+ if (!mcled_cdev)
+ return;
+
+ led_classdev_unregister(&mcled_cdev->led_cdev);
+}
+EXPORT_SYMBOL_GPL(led_classdev_multicolor_unregister);
+
+static void devm_led_classdev_multicolor_release(struct device *dev, void *res)
+{
+ led_classdev_multicolor_unregister(*(struct led_classdev_mc **)res);
+}
+
+int devm_led_classdev_multicolor_register_ext(struct device *parent,
+ struct led_classdev_mc *mcled_cdev,
+ struct led_init_data *init_data)
+{
+ struct led_classdev_mc **dr;
+ int ret;
+
+ dr = devres_alloc(devm_led_classdev_multicolor_release,
+ sizeof(*dr), GFP_KERNEL);
+ if (!dr)
+ return -ENOMEM;
+
+ ret = led_classdev_multicolor_register_ext(parent, mcled_cdev,
+ init_data);
+ if (ret) {
+ devres_free(dr);
+ return ret;
+ }
+
+ *dr = mcled_cdev;
+ devres_add(parent, dr);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_led_classdev_multicolor_register_ext);
+
+static int devm_led_classdev_multicolor_match(struct device *dev,
+ void *res, void *data)
+{
+ struct led_classdev_mc **p = res;
+
+ if (WARN_ON(!p || !*p))
+ return 0;
+
+ return *p == data;
+}
+
+void devm_led_classdev_multicolor_unregister(struct device *dev,
+ struct led_classdev_mc *mcled_cdev)
+{
+ WARN_ON(devres_release(dev,
+ devm_led_classdev_multicolor_release,
+ devm_led_classdev_multicolor_match, mcled_cdev));
+}
+EXPORT_SYMBOL_GPL(devm_led_classdev_multicolor_unregister);
+
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_DESCRIPTION("Multi Color LED class interface");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/led-class-multicolor.h b/include/linux/led-class-multicolor.h
new file mode 100644
index 000000000000..a6a3715c0d48
--- /dev/null
+++ b/include/linux/led-class-multicolor.h
@@ -0,0 +1,121 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* LED Multicolor class interface
+ * Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/
+ */
+
+#ifndef __LINUX_MULTICOLOR_LEDS_H_INCLUDED
+#define __LINUX_MULTICOLOR_LEDS_H_INCLUDED
+
+#include <linux/leds.h>
+#include <dt-bindings/leds/common.h>
+
+struct led_multicolor_info {
+ int color_index;
+ int color_brightness;
+ int color_led_intensity;
+ int color_channel;
+};
+
+struct led_classdev_mc {
+ /* led class device */
+ struct led_classdev led_cdev;
+ int num_colors;
+
+ struct led_multicolor_info multicolor_info[LED_COLOR_ID_MAX];
+};
+
+static inline struct led_classdev_mc *lcdev_to_mccdev(
+ struct led_classdev *led_cdev)
+{
+ return container_of(led_cdev, struct led_classdev_mc, led_cdev);
+}
+
+#if IS_ENABLED(CONFIG_LEDS_CLASS_MULTI_COLOR)
+/**
+ * led_classdev_multicolor_register_ext - register a new object of led_classdev
+ * class with support for multicolor LEDs
+ * @parent: the multicolor LED to register
+ * @mcled_cdev: the led_classdev_mc structure for this device
+ * @init_data: the LED class Multi color device initialization data
+ *
+ * Returns: 0 on success or negative error value on failure
+ */
+int led_classdev_multicolor_register_ext(struct device *parent,
+ struct led_classdev_mc *mcled_cdev,
+ struct led_init_data *init_data);
+
+static inline int led_classdev_multicolor_register(struct device *parent,
+ struct led_classdev_mc *mcled_cdev)
+{
+ return led_classdev_multicolor_register_ext(parent, mcled_cdev, NULL);
+}
+
+/**
+ * led_classdev_multicolor_unregister - unregisters an object of led_classdev
+ * class with support for multicolor LEDs
+ * @mcled_cdev: the multicolor LED to unregister
+ *
+ * Unregister a previously registered via led_classdev_multicolor_register
+ * object
+ */
+void led_classdev_multicolor_unregister(struct led_classdev_mc *mcled_cdev);
+
+/* Calculate brightness for the monochrome LED cluster */
+int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
+ enum led_brightness brightness);
+
+int devm_led_classdev_multicolor_register_ext(struct device *parent,
+ struct led_classdev_mc *mcled_cdev,
+ struct led_init_data *init_data);
+
+static inline int devm_led_classdev_multicolor_register(struct device *parent,
+ struct led_classdev_mc *mcled_cdev)
+{
+ return devm_led_classdev_multicolor_register_ext(parent, mcled_cdev,
+ NULL);
+}
+
+void devm_led_classdev_multicolor_unregister(struct device *parent,
+ struct led_classdev_mc *mcled_cdev);
+#else
+
+static inline int led_classdev_multicolor_register_ext(struct device *parent,
+ struct led_classdev_mc *mcled_cdev,
+ struct led_init_data *init_data)
+{
+ return -EINVAL;
+}
+
+static inline int led_classdev_multicolor_register(struct device *parent,
+ struct led_classdev_mc *mcled_cdev)
+{
+ return led_classdev_multicolor_register_ext(parent, mcled_cdev, NULL);
+}
+
+static inline void led_classdev_multicolor_unregister(struct led_classdev_mc *mcled_cdev) {};
+static inline int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
+ enum led_brightness brightness)
+{
+ return -EINVAL;
+}
+
+static inline int devm_led_classdev_multicolor_register_ext(struct device *parent,
+ struct led_classdev_mc *mcled_cdev,
+ struct led_init_data *init_data)
+{
+ return -EINVAL;
+}
+
+static inline int devm_led_classdev_multicolor_register(struct device *parent,
+ struct led_classdev_mc *mcled_cdev)
+{
+ return devm_led_classdev_multicolor_register_ext(parent, mcled_cdev,
+ NULL);
+}
+
+static inline void devm_led_classdev_multicolor_unregister(struct device *parent,
+ struct led_classdev_mc *mcled_cdev)
+{};
+
+#endif /* IS_ENABLED(CONFIG_LEDS_CLASS_MULTI_COLOR) */
+#endif /* __LINUX_MULTICOLOR_LEDS_H_INCLUDED */
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* Re: [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-02 20:42 ` [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition Dan Murphy
@ 2020-04-03 3:47 ` Randy Dunlap
2020-04-03 14:39 ` Dan Murphy
2020-04-06 14:33 ` Dan Murphy
` (4 subsequent siblings)
5 siblings, 1 reply; 36+ messages in thread
From: Randy Dunlap @ 2020-04-03 3:47 UTC (permalink / raw)
To: Dan Murphy, jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel
Hi,
Here are a few changes for you to consider:
On 4/2/20 1:42 PM, Dan Murphy wrote:
> Introduce a multicolor class that groups colored LEDs
> within a LED node.
>
> The multi color class groups monochrome LEDs and allows controlling two
multicolor
> aspects of the final combined color: hue and lightness. The former is
> controlled via <color>_intensity files and the latter is controlled
> via brightness file.
>
> Signed-off-by: Dan Murphy <dmurphy@ti.com>
> ---
> diff --git a/Documentation/leds/leds-class-multicolor.rst b/Documentation/leds/leds-class-multicolor.rst
> new file mode 100644
> index 000000000000..5bb004999248
> --- /dev/null
> +++ b/Documentation/leds/leds-class-multicolor.rst
> @@ -0,0 +1,95 @@
> +====================================
> +Multi Color LED handling under Linux
Multicolor
> +====================================
> +
> +Description
> +===========
> +The multi color class groups monochrome LEDs and allows controlling two
multicolor
> +aspects of the final combined color: hue and lightness. The former is
> +controlled via the color_intensity array file and the latter is controlled
> +via brightness file.
> +
> +For more details on hue and lightness notions please refer to
> +https://en.wikipedia.org/wiki/CIECAM02.
> +
> +Multicolor Class Control
> +========================
> +The multicolor class presents files that groups the colors as indexes in an
> +array. These files are children under the LED parent node created by the
> +led_class framework. The led_class framework is documented in led-class.rst
> +within this documentation directory.
> +
> +Each colored LED will be indexed under the color_* files. The order of the
> +colors are arbitrary the color_index file can be read to determine the color
> +to index value.
> +
> +The color_index file is an array that contains the string list of the colors as
> +they are defined in each color_* array file.
> +
> +The color_intensity is an array that can be read or written to for the
> +individual color intensities. All elements within this array must be written in
> +order for the color LED intensities to be updated.
> +
> +The color_max_intensity is an array that can be read to indicate each color LED
> +maximum intensity value.
> +
> +The num_color_leds file returns the total number of color LEDs that are
> +presented in each color_* array.
> +
> +Directory Layout Example
> +========================
> +root:/sys/class/leds/multicolor:status# ls -lR
> +-rw-r--r-- 1 root root 4096 Oct 19 16:16 brightness
> +-r--r--r-- 1 root root 4096 Oct 19 16:16 color_index
> +-rw-r--r-- 1 root root 4096 Oct 19 16:16 color_intensity
> +-r--r--r-- 1 root root 4096 Oct 19 16:16 num_color_leds
> +
> +Multicolor Class Brightness Control
> +===================================
> +The multiclor class framework will calculate each monochrome LEDs intensity.
multicolor
> +
> +The brightness level for each LED is calculated based on the color LED
> +intensity setting divided by the parent max_brightness setting multiplied by
> +the requested brightness.
> +
> +led_brightness = brightness * color_intensity/max_brightness
> +
> +Example:
> +A user first writes the color_intensity file with the brightness levels
> +that for each LED that is necessary to achieve a blueish violet output from a
drop first "that".
that are necessary from an
> +RGB LED group.
> +
> +cat /sys/class/leds/multicolor:status/color_index
> +green blue red
> +
> +echo 43 226 138 > /sys/class/leds/multicolor:status/color_intensity
> +
> +red -
> + intensity = 138
> + max_brightness = 255
> +green -
> + intensity = 43
> + max_brightness = 255
> +blue -
> + intensity = 226
> + max_brightness = 255
> +
> +The user can control the brightness of that RGB group by writing the parent
> +'brightness' control. Assuming a parent max_brightness of 255 the user may want
> +to dim the LED color group to half. The user would write a value of 128 to the
> +parent brightness file then the values written to each LED will be adjusted
> +base on this value
value.
> +
> +cat /sys/class/leds/multicolor:status/max_brightness
> +255
> +echo 128 > /sys/class/leds/multicolor:status/brightness
> +
> +adjusted_red_value = 128 * 138/255 = 69
> +adjusted_green_value = 128 * 43/255 = 21
> +adjusted_blue_value = 128 * 226/255 = 113
> +
> +Reading the parent brightness file will return the current brightness value of
> +the color LED group.
> +
> +cat /sys/class/leds/multicolor:status/brightness
> +128
> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
> index d82f1dea3711..2e4611b25054 100644
> --- a/drivers/leds/Kconfig
> +++ b/drivers/leds/Kconfig
> @@ -30,6 +30,16 @@ config LEDS_CLASS_FLASH
> for the flash related features of a LED device. It can be built
> as a module.
>
> +config LEDS_CLASS_MULTI_COLOR
> + tristate "LED Multi Color LED Class Support"
Multicolor
> + depends on LEDS_CLASS
> + help
> + This option enables the multicolor LED sysfs class in /sys/class/leds.
> + It wraps LED class and adds multicolor LED specific sysfs attributes
> + and kernel internal API to it. You'll need this to provide support
> + for multicolor LEDs that are grouped together. This class is not
> + intended for single color LEDs. It can be built as a module.
> +
> config LEDS_BRIGHTNESS_HW_CHANGED
> bool "LED Class brightness_hw_changed attribute support"
> depends on LEDS_CLASS
thanks.
--
~Randy
^ permalink raw reply [flat|nested] 36+ messages in thread* Re: [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-03 3:47 ` Randy Dunlap
@ 2020-04-03 14:39 ` Dan Murphy
2020-04-05 15:08 ` Jacek Anaszewski
0 siblings, 1 reply; 36+ messages in thread
From: Dan Murphy @ 2020-04-03 14:39 UTC (permalink / raw)
To: Randy Dunlap, jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel
Randy
Thanks for the review
On 4/2/20 10:47 PM, Randy Dunlap wrote:
> Hi,
> Here are a few changes for you to consider:
>
> On 4/2/20 1:42 PM, Dan Murphy wrote:
>> Introduce a multicolor class that groups colored LEDs
>> within a LED node.
>>
>> The multi color class groups monochrome LEDs and allows controlling two
> multicolor
Ack
>
>> aspects of the final combined color: hue and lightness. The former is
>> controlled via <color>_intensity files and the latter is controlled
>> via brightness file.
>>
>> Signed-off-by: Dan Murphy <dmurphy@ti.com>
>> ---
>
>> diff --git a/Documentation/leds/leds-class-multicolor.rst b/Documentation/leds/leds-class-multicolor.rst
>> new file mode 100644
>> index 000000000000..5bb004999248
>> --- /dev/null
>> +++ b/Documentation/leds/leds-class-multicolor.rst
>> @@ -0,0 +1,95 @@
>> +====================================
>> +Multi Color LED handling under Linux
> Multicolor
Ack
>
>> +====================================
>> +
>> +Description
>> +===========
>> +The multi color class groups monochrome LEDs and allows controlling two
> multicolor
Ack
>
>> +aspects of the final combined color: hue and lightness. The former is
>> +controlled via the color_intensity array file and the latter is controlled
>> +via brightness file.
>> +
>> +For more details on hue and lightness notions please refer to
>> +https://en.wikipedia.org/wiki/CIECAM02.
>> +
>> +Multicolor Class Control
>> +========================
>> +The multicolor class presents files that groups the colors as indexes in an
>> +array. These files are children under the LED parent node created by the
>> +led_class framework. The led_class framework is documented in led-class.rst
>> +within this documentation directory.
>> +
>> +Each colored LED will be indexed under the color_* files. The order of the
>> +colors are arbitrary the color_index file can be read to determine the color
>> +to index value.
>> +
>> +The color_index file is an array that contains the string list of the colors as
>> +they are defined in each color_* array file.
>> +
>> +The color_intensity is an array that can be read or written to for the
>> +individual color intensities. All elements within this array must be written in
>> +order for the color LED intensities to be updated.
>> +
>> +The color_max_intensity is an array that can be read to indicate each color LED
>> +maximum intensity value.
>> +
>> +The num_color_leds file returns the total number of color LEDs that are
>> +presented in each color_* array.
>> +
>> +Directory Layout Example
>> +========================
>> +root:/sys/class/leds/multicolor:status# ls -lR
>> +-rw-r--r-- 1 root root 4096 Oct 19 16:16 brightness
>> +-r--r--r-- 1 root root 4096 Oct 19 16:16 color_index
>> +-rw-r--r-- 1 root root 4096 Oct 19 16:16 color_intensity
>> +-r--r--r-- 1 root root 4096 Oct 19 16:16 num_color_leds
>> +
>> +Multicolor Class Brightness Control
>> +===================================
>> +The multiclor class framework will calculate each monochrome LEDs intensity.
> multicolor
Ack
>
>> +
>> +The brightness level for each LED is calculated based on the color LED
>> +intensity setting divided by the parent max_brightness setting multiplied by
>> +the requested brightness.
>> +
>> +led_brightness = brightness * color_intensity/max_brightness
>> +
>> +Example:
>> +A user first writes the color_intensity file with the brightness levels
>> +that for each LED that is necessary to achieve a blueish violet output from a
> drop first "that".
Ack
> that are necessary from an
Ack and NACK the "from an". It is from a since R is a consonant
>> +RGB LED group.
>> +
>> +cat /sys/class/leds/multicolor:status/color_index
>> +green blue red
>> +
>> +echo 43 226 138 > /sys/class/leds/multicolor:status/color_intensity
>> +
>> +red -
>> + intensity = 138
>> + max_brightness = 255
>> +green -
>> + intensity = 43
>> + max_brightness = 255
>> +blue -
>> + intensity = 226
>> + max_brightness = 255
>> +
>> +The user can control the brightness of that RGB group by writing the parent
>> +'brightness' control. Assuming a parent max_brightness of 255 the user may want
>> +to dim the LED color group to half. The user would write a value of 128 to the
>> +parent brightness file then the values written to each LED will be adjusted
>> +base on this value
> value.
Ack
>
>> +
>> +cat /sys/class/leds/multicolor:status/max_brightness
>> +255
>> +echo 128 > /sys/class/leds/multicolor:status/brightness
>> +
>> +adjusted_red_value = 128 * 138/255 = 69
>> +adjusted_green_value = 128 * 43/255 = 21
>> +adjusted_blue_value = 128 * 226/255 = 113
>> +
>> +Reading the parent brightness file will return the current brightness value of
>> +the color LED group.
>> +
>> +cat /sys/class/leds/multicolor:status/brightness
>> +128
>> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
>> index d82f1dea3711..2e4611b25054 100644
>> --- a/drivers/leds/Kconfig
>> +++ b/drivers/leds/Kconfig
>> @@ -30,6 +30,16 @@ config LEDS_CLASS_FLASH
>> for the flash related features of a LED device. It can be built
>> as a module.
>>
>> +config LEDS_CLASS_MULTI_COLOR
>> + tristate "LED Multi Color LED Class Support"
> Multicolor
Ack
Dan
^ permalink raw reply [flat|nested] 36+ messages in thread
* Re: [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-03 14:39 ` Dan Murphy
@ 2020-04-05 15:08 ` Jacek Anaszewski
[not found] ` <f09dadc9-f1ed-091b-f241-2f40b48f1117@ti.com>
0 siblings, 1 reply; 36+ messages in thread
From: Jacek Anaszewski @ 2020-04-05 15:08 UTC (permalink / raw)
To: Dan Murphy, Randy Dunlap, pavel; +Cc: linux-leds, linux-kernel
Dan,
On 4/3/20 4:39 PM, Dan Murphy wrote:
> Randy
>
> Thanks for the review
>
> On 4/2/20 10:47 PM, Randy Dunlap wrote:
>> Hi,
>> Here are a few changes for you to consider:
>>
>> On 4/2/20 1:42 PM, Dan Murphy wrote:
>>> Introduce a multicolor class that groups colored LEDs
>>> within a LED node.
>>>
>>> The multi color class groups monochrome LEDs and allows controlling two
>> multicolor
> Ack
>>
>>> aspects of the final combined color: hue and lightness. The former is
>>> controlled via <color>_intensity files and the latter is controlled
>>> via brightness file.
>>>
>>> Signed-off-by: Dan Murphy <dmurphy@ti.com>
>>> ---
>>
>>> diff --git a/Documentation/leds/leds-class-multicolor.rst
>>> b/Documentation/leds/leds-class-multicolor.rst
>>> new file mode 100644
>>> index 000000000000..5bb004999248
>>> --- /dev/null
>>> +++ b/Documentation/leds/leds-class-multicolor.rst
>>> @@ -0,0 +1,95 @@
>>> +====================================
>>> +Multi Color LED handling under Linux
>> Multicolor
> Ack
>>
>>> +====================================
>>> +
>>> +Description
>>> +===========
>>> +The multi color class groups monochrome LEDs and allows controlling two
>> multicolor
> Ack
>>
>>> +aspects of the final combined color: hue and lightness. The former is
>>> +controlled via the color_intensity array file and the latter is
>>> controlled
>>> +via brightness file.
>>> +
>>> +For more details on hue and lightness notions please refer to
>>> +https://en.wikipedia.org/wiki/CIECAM02.
>>> +
>>> +Multicolor Class Control
>>> +========================
>>> +The multicolor class presents files that groups the colors as
>>> indexes in an
>>> +array. These files are children under the LED parent node created
>>> by the
>>> +led_class framework. The led_class framework is documented in
>>> led-class.rst
>>> +within this documentation directory.
>>> +
>>> +Each colored LED will be indexed under the color_* files. The order
>>> of the
>>> +colors are arbitrary the color_index file can be read to determine
>>> the color
>>> +to index value.
>>> +
>>> +The color_index file is an array that contains the string list of
>>> the colors as
>>> +they are defined in each color_* array file.
>>> +
>>> +The color_intensity is an array that can be read or written to for the
>>> +individual color intensities. All elements within this array must
>>> be written in
>>> +order for the color LED intensities to be updated.
>>> +
>>> +The color_max_intensity is an array that can be read to indicate
>>> each color LED
>>> +maximum intensity value.
>>> +
>>> +The num_color_leds file returns the total number of color LEDs that are
>>> +presented in each color_* array.
>>> +
>>> +Directory Layout Example
>>> +========================
>>> +root:/sys/class/leds/multicolor:status# ls -lR
>>> +-rw-r--r-- 1 root root 4096 Oct 19 16:16 brightness
>>> +-r--r--r-- 1 root root 4096 Oct 19 16:16 color_index
>>> +-rw-r--r-- 1 root root 4096 Oct 19 16:16
>>> color_intensity
>>> +-r--r--r-- 1 root root 4096 Oct 19 16:16 num_color_leds
>>> +
>>> +Multicolor Class Brightness Control
>>> +===================================
>>> +The multiclor class framework will calculate each monochrome LEDs
>>> intensity.
>> multicolor
> Ack
>>
>>> +
>>> +The brightness level for each LED is calculated based on the color LED
>>> +intensity setting divided by the parent max_brightness setting
>>> multiplied by
>>> +the requested brightness.
>>> +
>>> +led_brightness = brightness * color_intensity/max_brightness
>>> +
>>> +Example:
>>> +A user first writes the color_intensity file with the brightness levels
>>> +that for each LED that is necessary to achieve a blueish violet
>>> output from a
>> drop first "that".
> Ack
>> that are
>> necessary from an
> Ack and NACK the "from an". It is from a since R is a consonant
But it sounds like a vowel and this rule for creating articles
"applies to the sound of the letter beginning the word, not just the
letter itself" [0].
[0] https://www.grammar.com/a-vs-an-when-to-use/
--
Best regards,
Jacek Anaszewski
^ permalink raw reply [flat|nested] 36+ messages in thread
* Re: [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-02 20:42 ` [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition Dan Murphy
2020-04-03 3:47 ` Randy Dunlap
@ 2020-04-06 14:33 ` Dan Murphy
2020-04-06 19:25 ` Jacek Anaszewski
` (3 subsequent siblings)
5 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-06 14:33 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel
Pavel
On 4/2/20 3:42 PM, Dan Murphy wrote:
> Introduce a multicolor class that groups colored LEDs
> within a LED node.
>
> The multi color class groups monochrome LEDs and allows controlling two
> aspects of the final combined color: hue and lightness. The former is
> controlled via <color>_intensity files and the latter is controlled
> via brightness file.
>
> Signed-off-by: Dan Murphy <dmurphy@ti.com>
> ---
Still looking for comments and reviews from you on this specific patch
and implementation
Dan
^ permalink raw reply [flat|nested] 36+ messages in thread* Re: [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-02 20:42 ` [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition Dan Murphy
2020-04-03 3:47 ` Randy Dunlap
2020-04-06 14:33 ` Dan Murphy
@ 2020-04-06 19:25 ` Jacek Anaszewski
2020-04-07 14:52 ` Dan Murphy
2020-04-07 21:08 ` Jacek Anaszewski
` (2 subsequent siblings)
5 siblings, 1 reply; 36+ messages in thread
From: Jacek Anaszewski @ 2020-04-06 19:25 UTC (permalink / raw)
To: Dan Murphy, pavel; +Cc: linux-leds, linux-kernel
Hi Dan,
Thanks for the update. I have a few comments below.
On 4/2/20 10:42 PM, Dan Murphy wrote:
> Introduce a multicolor class that groups colored LEDs
> within a LED node.
>
> The multi color class groups monochrome LEDs and allows controlling two
> aspects of the final combined color: hue and lightness. The former is
> controlled via <color>_intensity files and the latter is controlled
> via brightness file.
>
> Signed-off-by: Dan Murphy <dmurphy@ti.com>
> ---
> .../ABI/testing/sysfs-class-led-multicolor | 42 ++++
> Documentation/leds/index.rst | 1 +
> Documentation/leds/leds-class-multicolor.rst | 95 ++++++++
> drivers/leds/Kconfig | 10 +
> drivers/leds/Makefile | 1 +
> drivers/leds/led-class-multicolor.c | 206 ++++++++++++++++++
> include/linux/led-class-multicolor.h | 121 ++++++++++
> 7 files changed, 476 insertions(+)
> create mode 100644 Documentation/ABI/testing/sysfs-class-led-multicolor
> create mode 100644 Documentation/leds/leds-class-multicolor.rst
> create mode 100644 drivers/leds/led-class-multicolor.c
> create mode 100644 include/linux/led-class-multicolor.h
>
> diff --git a/Documentation/ABI/testing/sysfs-class-led-multicolor b/Documentation/ABI/testing/sysfs-class-led-multicolor
> new file mode 100644
> index 000000000000..1f50324d24fd
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-class-led-multicolor
> @@ -0,0 +1,42 @@
> +What: /sys/class/leds/<led>/brightness
> +Date: March 2020
> +KernelVersion: 5.8
> +Contact: Dan Murphy <dmurphy@ti.com>
> +Description: read/write
> + Writing to this file will update all LEDs within the group to a
> + calculated percentage of what each color LED intensity is set
> + to. The percentage is calculated for each grouped LED via the
> + equation below:
> +
> + led_brightness = brightness * color_intensity/max_brightness
> +
> + For additional details please refer to
> + Documentation/leds/leds-class-multicolor.rst.
> +
> + The value of the color is from 0 to
> + /sys/class/leds/<led>/max_brightness.
> +
> +What: /sys/class/leds/<led>/color_index
> +Date: March 2020
> +KernelVersion: 5.8
> +Contact: Dan Murphy <dmurphy@ti.com>
> +Description: read
> + The color_index array, when read, will output the LED colors
> + by name as they are indexed in the color_intensity array.
> +
> +What: /sys/class/leds/<led>/num_colors
> +Date: March 2020
> +KernelVersion: 5.8
> +Contact: Dan Murphy <dmurphy@ti.com>
> +Description: read
> + The num_colors indicates the number of LEDs defined in the
> + color_intensity and color_index arrays.
> +
> +What: /sys/class/leds/<led>/color_intensity
> +Date: March 2020
> +KernelVersion: 5.8
> +Contact: Dan Murphy <dmurphy@ti.com>
> +Description: read/write
> + Intensity level for the LED color within the array.
> + The intensities for each color must be entered based on the
> + color_index array.
> diff --git a/Documentation/leds/index.rst b/Documentation/leds/index.rst
> index 060f4e485897..bc70c6aa7138 100644
> --- a/Documentation/leds/index.rst
> +++ b/Documentation/leds/index.rst
> @@ -9,6 +9,7 @@ LEDs
>
> leds-class
> leds-class-flash
> + leds-class-multicolor
> ledtrig-oneshot
> ledtrig-transient
> ledtrig-usbport
> diff --git a/Documentation/leds/leds-class-multicolor.rst b/Documentation/leds/leds-class-multicolor.rst
> new file mode 100644
> index 000000000000..5bb004999248
> --- /dev/null
> +++ b/Documentation/leds/leds-class-multicolor.rst
> @@ -0,0 +1,95 @@
> +====================================
> +Multi Color LED handling under Linux
> +====================================
> +
> +Description
> +===========
> +The multi color class groups monochrome LEDs and allows controlling two
> +aspects of the final combined color: hue and lightness. The former is
> +controlled via the color_intensity array file and the latter is controlled
> +via brightness file.
> +
> +For more details on hue and lightness notions please refer to
> +https://en.wikipedia.org/wiki/CIECAM02.
> +
> +Multicolor Class Control
> +========================
> +The multicolor class presents files that groups the colors as indexes in an
> +array. These files are children under the LED parent node created by the
> +led_class framework. The led_class framework is documented in led-class.rst
> +within this documentation directory.
> +
> +Each colored LED will be indexed under the color_* files. The order of the
> +colors are arbitrary the color_index file can be read to determine the color
Something wrong with punctuation here, or it is even a stylistic
problem.
> +to index value.
> +
> +The color_index file is an array that contains the string list of the colors as
> +they are defined in each color_* array file.
> +
> +The color_intensity is an array that can be read or written to for the
> +individual color intensities. All elements within this array must be written in
> +order for the color LED intensities to be updated.
> +
> +The color_max_intensity is an array that can be read to indicate each color LED
> +maximum intensity value.
> +
> +The num_color_leds file returns the total number of color LEDs that are
> +presented in each color_* array.
> +
> +Directory Layout Example
> +========================
> +root:/sys/class/leds/multicolor:status# ls -lR
> +-rw-r--r-- 1 root root 4096 Oct 19 16:16 brightness
> +-r--r--r-- 1 root root 4096 Oct 19 16:16 color_index
> +-rw-r--r-- 1 root root 4096 Oct 19 16:16 color_intensity
> +-r--r--r-- 1 root root 4096 Oct 19 16:16 num_color_leds
> +
> +Multicolor Class Brightness Control
> +===================================
> +The multiclor class framework will calculate each monochrome LEDs intensity.
> +
> +The brightness level for each LED is calculated based on the color LED
> +intensity setting divided by the parent max_brightness setting multiplied by
> +the requested brightness.
> +
> +led_brightness = brightness * color_intensity/max_brightness
> +
> +Example:
> +A user first writes the color_intensity file with the brightness levels
> +that for each LED that is necessary to achieve a blueish violet output from a
> +RGB LED group.
> +
> +cat /sys/class/leds/multicolor:status/color_index
> +green blue red
> +
> +echo 43 226 138 > /sys/class/leds/multicolor:status/color_intensity
> +
> +red -
> + intensity = 138
> + max_brightness = 255
> +green -
> + intensity = 43
> + max_brightness = 255
> +blue -
> + intensity = 226
> + max_brightness = 255
> +
> +The user can control the brightness of that RGB group by writing the parent
s/RGB/multicolor/
> +'brightness' control. Assuming a parent max_brightness of 255 the user may want
> +to dim the LED color group to half. The user would write a value of 128 to the
> +parent brightness file then the values written to each LED will be adjusted
> +base on this value
> +
> +cat /sys/class/leds/multicolor:status/max_brightness
> +255
> +echo 128 > /sys/class/leds/multicolor:status/brightness
> +
> +adjusted_red_value = 128 * 138/255 = 69
> +adjusted_green_value = 128 * 43/255 = 21
> +adjusted_blue_value = 128 * 226/255 = 113
> +
> +Reading the parent brightness file will return the current brightness value of
> +the color LED group.
> +
> +cat /sys/class/leds/multicolor:status/brightness
> +128
> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
> index d82f1dea3711..2e4611b25054 100644
> --- a/drivers/leds/Kconfig
> +++ b/drivers/leds/Kconfig
> @@ -30,6 +30,16 @@ config LEDS_CLASS_FLASH
> for the flash related features of a LED device. It can be built
> as a module.
>
> +config LEDS_CLASS_MULTI_COLOR
> + tristate "LED Multi Color LED Class Support"
> + depends on LEDS_CLASS
> + help
> + This option enables the multicolor LED sysfs class in /sys/class/leds.
> + It wraps LED class and adds multicolor LED specific sysfs attributes
> + and kernel internal API to it. You'll need this to provide support
> + for multicolor LEDs that are grouped together. This class is not
> + intended for single color LEDs. It can be built as a module.
> +
> config LEDS_BRIGHTNESS_HW_CHANGED
> bool "LED Class brightness_hw_changed attribute support"
> depends on LEDS_CLASS
> diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
> index d7e1107753fb..310b5518783a 100644
> --- a/drivers/leds/Makefile
> +++ b/drivers/leds/Makefile
> @@ -4,6 +4,7 @@
> obj-$(CONFIG_NEW_LEDS) += led-core.o
> obj-$(CONFIG_LEDS_CLASS) += led-class.o
> obj-$(CONFIG_LEDS_CLASS_FLASH) += led-class-flash.o
> +obj-$(CONFIG_LEDS_CLASS_MULTI_COLOR) += led-class-multicolor.o
> obj-$(CONFIG_LEDS_TRIGGERS) += led-triggers.o
>
> # LED Platform Drivers
> diff --git a/drivers/leds/led-class-multicolor.c b/drivers/leds/led-class-multicolor.c
> new file mode 100644
> index 000000000000..838b1d679647
> --- /dev/null
> +++ b/drivers/leds/led-class-multicolor.c
> @@ -0,0 +1,206 @@
> +// SPDX-License-Identifier: GPL-2.0
> +// LED Multi Color class interface
> +// Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/
> +// Author: Dan Murphy <dmurphy@ti.com>
> +
> +#include <linux/device.h>
> +#include <linux/init.h>
> +#include <linux/led-class-multicolor.h>
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <linux/uaccess.h>
> +
> +#include "leds.h"
> +
> +int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
> + enum led_brightness brightness)
> +{
> + struct led_classdev *led_cdev = &mcled_cdev->led_cdev;
> + int i;
> +
> + for (i = 0; i < mcled_cdev->num_colors; i++)
> + mcled_cdev->multicolor_info[i].color_brightness = (brightness *
> + mcled_cdev->multicolor_info[i].color_led_intensity /
> + led_cdev->max_brightness);
Why the need for brackets?
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(led_mc_calc_color_components);
> +
> +static ssize_t color_intensity_store(struct device *dev,
> + struct device_attribute *intensity_attr,
> + const char *buf, size_t size)
> +{
> + struct led_classdev *led_cdev = dev_get_drvdata(dev);
> + struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
> + int nrchars, offset = 0;
> + int intensity_value[LED_COLOR_ID_MAX];
> + int i;
> + ssize_t ret;
> +
> + mutex_lock(&led_cdev->led_access);
> +
> + for (i = 0; i < mcled_cdev->num_colors; i++) {
> + ret = sscanf(buf + offset, "%i%n",
> + &intensity_value[i], &nrchars);
> + if (ret != 1) {
> + dev_err(led_cdev->dev,
> + "Incorrect number of LEDs expected %i values intensity was not applied\n",
> + mcled_cdev->num_colors);
> + goto err_out;
> + }
> + offset += nrchars;
> + }
> +
> + for (i = 0; i < mcled_cdev->num_colors; i++)
> + mcled_cdev->multicolor_info[i].color_led_intensity =
> + intensity_value[i];
> +
> + led_set_brightness(led_cdev, led_cdev->brightness);
> +err_out:
> + ret = size;
> + mutex_unlock(&led_cdev->led_access);
> + return ret;
> +}
> +
> +static ssize_t color_intensity_show(struct device *dev,
> + struct device_attribute *intensity_attr,
> + char *buf)
> +{
> + struct led_classdev *led_cdev = dev_get_drvdata(dev);
> + struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
> + int len = 0;
> + int i;
> +
> + for (i = 0; i < mcled_cdev->num_colors; i++)
> + len += sprintf(buf + len, "%d ",
> + mcled_cdev->multicolor_info[i].color_led_intensity);
> +
> + len += sprintf(buf + len, "%s", "\n");
> +
> + return len;
> +}
> +static DEVICE_ATTR_RW(color_intensity);
> +
> +static ssize_t color_index_show(struct device *dev,
> + struct device_attribute *color_index_attr,
> + char *buf)
> +{
> + struct led_classdev *led_cdev = dev_get_drvdata(dev);
> + struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
> + int len = 0;
> + int index;
> + int i;
> +
> + for (i = 0; i < mcled_cdev->num_colors; i++) {
> + index = mcled_cdev->multicolor_info[i].color_index;
> + len += sprintf(buf + len, "%s ", led_colors[index]);
> + }
> +
> + len += sprintf(buf + len, "%s", "\n");
> +
> + return len;
> +}
> +static DEVICE_ATTR_RO(color_index);
> +
> +static ssize_t num_colors_show(struct device *dev,
> + struct device_attribute *max_intensity_attr,
> + char *buf)
> +{
> + struct led_classdev *led_cdev = dev_get_drvdata(dev);
> + struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
> +
> + return sprintf(buf, "%d\n", mcled_cdev->num_colors);
> +}
> +static DEVICE_ATTR_RO(num_colors);
> +
> +static struct attribute *led_multicolor_attrs[] = {
> + &dev_attr_color_intensity.attr,
> + &dev_attr_color_index.attr,
> + &dev_attr_num_colors.attr,
> + NULL,
> +};
> +ATTRIBUTE_GROUPS(led_multicolor);
> +
> +int led_classdev_multicolor_register_ext(struct device *parent,
> + struct led_classdev_mc *mcled_cdev,
> + struct led_init_data *init_data)
> +{
> + struct led_classdev *led_cdev;
> +
> + if (!mcled_cdev)
> + return -EINVAL;
> +
> + if (!mcled_cdev->num_colors)
> + return -EINVAL;
> +
> + led_cdev = &mcled_cdev->led_cdev;
> + mcled_cdev->led_cdev.groups = led_multicolor_groups;
> +
> + return led_classdev_register_ext(parent, led_cdev, init_data);
> +}
> +EXPORT_SYMBOL_GPL(led_classdev_multicolor_register_ext);
> +
> +void led_classdev_multicolor_unregister(struct led_classdev_mc *mcled_cdev)
> +{
> + if (!mcled_cdev)
> + return;
> +
> + led_classdev_unregister(&mcled_cdev->led_cdev);
> +}
> +EXPORT_SYMBOL_GPL(led_classdev_multicolor_unregister);
> +
> +static void devm_led_classdev_multicolor_release(struct device *dev, void *res)
> +{
> + led_classdev_multicolor_unregister(*(struct led_classdev_mc **)res);
> +}
> +
> +int devm_led_classdev_multicolor_register_ext(struct device *parent,
> + struct led_classdev_mc *mcled_cdev,
> + struct led_init_data *init_data)
> +{
> + struct led_classdev_mc **dr;
> + int ret;
> +
> + dr = devres_alloc(devm_led_classdev_multicolor_release,
> + sizeof(*dr), GFP_KERNEL);
> + if (!dr)
> + return -ENOMEM;
> +
> + ret = led_classdev_multicolor_register_ext(parent, mcled_cdev,
> + init_data);
> + if (ret) {
> + devres_free(dr);
> + return ret;
> + }
> +
> + *dr = mcled_cdev;
> + devres_add(parent, dr);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(devm_led_classdev_multicolor_register_ext);
> +
> +static int devm_led_classdev_multicolor_match(struct device *dev,
> + void *res, void *data)
> +{
> + struct led_classdev_mc **p = res;
> +
> + if (WARN_ON(!p || !*p))
> + return 0;
> +
> + return *p == data;
> +}
> +
> +void devm_led_classdev_multicolor_unregister(struct device *dev,
> + struct led_classdev_mc *mcled_cdev)
> +{
> + WARN_ON(devres_release(dev,
> + devm_led_classdev_multicolor_release,
> + devm_led_classdev_multicolor_match, mcled_cdev));
> +}
> +EXPORT_SYMBOL_GPL(devm_led_classdev_multicolor_unregister);
> +
> +MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
> +MODULE_DESCRIPTION("Multi Color LED class interface");
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/led-class-multicolor.h b/include/linux/led-class-multicolor.h
> new file mode 100644
> index 000000000000..a6a3715c0d48
> --- /dev/null
> +++ b/include/linux/led-class-multicolor.h
> @@ -0,0 +1,121 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/* LED Multicolor class interface
> + * Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/
> + */
> +
> +#ifndef __LINUX_MULTICOLOR_LEDS_H_INCLUDED
> +#define __LINUX_MULTICOLOR_LEDS_H_INCLUDED
> +
> +#include <linux/leds.h>
> +#include <dt-bindings/leds/common.h>
> +
> +struct led_multicolor_info {
> + int color_index;
> + int color_brightness;
> + int color_led_intensity;
> + int color_channel;
> +};
> +
> +struct led_classdev_mc {
> + /* led class device */
> + struct led_classdev led_cdev;
> + int num_colors;
> +
> + struct led_multicolor_info multicolor_info[LED_COLOR_ID_MAX];
I still have a problem with this fixed array that can grow for each
driver as new color identifiers are added to the LED core. Not
mentioning waste of memory due to unused colors. This is bad design.
> +};
> +
> +static inline struct led_classdev_mc *lcdev_to_mccdev(
> + struct led_classdev *led_cdev)
> +{
> + return container_of(led_cdev, struct led_classdev_mc, led_cdev);
> +}
> +
> +#if IS_ENABLED(CONFIG_LEDS_CLASS_MULTI_COLOR)
> +/**
> + * led_classdev_multicolor_register_ext - register a new object of led_classdev
> + * class with support for multicolor LEDs
> + * @parent: the multicolor LED to register
> + * @mcled_cdev: the led_classdev_mc structure for this device
> + * @init_data: the LED class Multi color device initialization data
> + *
> + * Returns: 0 on success or negative error value on failure
> + */
> +int led_classdev_multicolor_register_ext(struct device *parent,
> + struct led_classdev_mc *mcled_cdev,
> + struct led_init_data *init_data);
> +
> +static inline int led_classdev_multicolor_register(struct device *parent,
> + struct led_classdev_mc *mcled_cdev)
> +{
> + return led_classdev_multicolor_register_ext(parent, mcled_cdev, NULL);
> +}
> +
> +/**
> + * led_classdev_multicolor_unregister - unregisters an object of led_classdev
> + * class with support for multicolor LEDs
> + * @mcled_cdev: the multicolor LED to unregister
> + *
> + * Unregister a previously registered via led_classdev_multicolor_register
> + * object
> + */
> +void led_classdev_multicolor_unregister(struct led_classdev_mc *mcled_cdev);
> +
> +/* Calculate brightness for the monochrome LED cluster */
> +int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
> + enum led_brightness brightness);
> +
> +int devm_led_classdev_multicolor_register_ext(struct device *parent,
> + struct led_classdev_mc *mcled_cdev,
> + struct led_init_data *init_data);
> +
> +static inline int devm_led_classdev_multicolor_register(struct device *parent,
> + struct led_classdev_mc *mcled_cdev)
> +{
> + return devm_led_classdev_multicolor_register_ext(parent, mcled_cdev,
> + NULL);
> +}
> +
> +void devm_led_classdev_multicolor_unregister(struct device *parent,
> + struct led_classdev_mc *mcled_cdev);
> +#else
> +
> +static inline int led_classdev_multicolor_register_ext(struct device *parent,
> + struct led_classdev_mc *mcled_cdev,
> + struct led_init_data *init_data)
> +{
> + return -EINVAL;
> +}
> +
> +static inline int led_classdev_multicolor_register(struct device *parent,
> + struct led_classdev_mc *mcled_cdev)
> +{
> + return led_classdev_multicolor_register_ext(parent, mcled_cdev, NULL);
> +}
> +
> +static inline void led_classdev_multicolor_unregister(struct led_classdev_mc *mcled_cdev) {};
> +static inline int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
> + enum led_brightness brightness)
> +{
> + return -EINVAL;
> +}
> +
> +static inline int devm_led_classdev_multicolor_register_ext(struct device *parent,
> + struct led_classdev_mc *mcled_cdev,
> + struct led_init_data *init_data)
> +{
> + return -EINVAL;
> +}
> +
> +static inline int devm_led_classdev_multicolor_register(struct device *parent,
> + struct led_classdev_mc *mcled_cdev)
> +{
> + return devm_led_classdev_multicolor_register_ext(parent, mcled_cdev,
> + NULL);
> +}
> +
> +static inline void devm_led_classdev_multicolor_unregister(struct device *parent,
> + struct led_classdev_mc *mcled_cdev)
> +{};
> +
> +#endif /* IS_ENABLED(CONFIG_LEDS_CLASS_MULTI_COLOR) */
> +#endif /* __LINUX_MULTICOLOR_LEDS_H_INCLUDED */
>
--
Best regards,
Jacek Anaszewski
^ permalink raw reply [flat|nested] 36+ messages in thread* Re: [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-06 19:25 ` Jacek Anaszewski
@ 2020-04-07 14:52 ` Dan Murphy
0 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-07 14:52 UTC (permalink / raw)
To: Jacek Anaszewski, pavel; +Cc: linux-leds, linux-kernel
Jacek
On 4/6/20 2:25 PM, Jacek Anaszewski wrote:
> Hi Dan,
>
> Thanks for the update. I have a few comments below.
>
> On 4/2/20 10:42 PM, Dan Murphy wrote:
>> Introduce a multicolor class that groups colored LEDs
>> within a LED node.
>>
>> The multi color class groups monochrome LEDs and allows controlling two
>> aspects of the final combined color: hue and lightness. The former is
>> controlled via <color>_intensity files and the latter is controlled
>> via brightness file.
>>
>> Signed-off-by: Dan Murphy <dmurphy@ti.com>
>> ---
>> .../ABI/testing/sysfs-class-led-multicolor | 42 ++++
>> Documentation/leds/index.rst | 1 +
>> Documentation/leds/leds-class-multicolor.rst | 95 ++++++++
>> drivers/leds/Kconfig | 10 +
>> drivers/leds/Makefile | 1 +
>> drivers/leds/led-class-multicolor.c | 206 ++++++++++++++++++
>> include/linux/led-class-multicolor.h | 121 ++++++++++
>> 7 files changed, 476 insertions(+)
>> create mode 100644 Documentation/ABI/testing/sysfs-class-led-multicolor
>> create mode 100644 Documentation/leds/leds-class-multicolor.rst
>> create mode 100644 drivers/leds/led-class-multicolor.c
>> create mode 100644 include/linux/led-class-multicolor.h
>>
>> diff --git a/Documentation/ABI/testing/sysfs-class-led-multicolor b/Documentation/ABI/testing/sysfs-class-led-multicolor
>> new file mode 100644
>> index 000000000000..1f50324d24fd
>> --- /dev/null
>> +++ b/Documentation/ABI/testing/sysfs-class-led-multicolor
>> @@ -0,0 +1,42 @@
>> +What: /sys/class/leds/<led>/brightness
>> +Date: March 2020
>> +KernelVersion: 5.8
>> +Contact: Dan Murphy <dmurphy@ti.com>
>> +Description: read/write
>> + Writing to this file will update all LEDs within the group to a
>> + calculated percentage of what each color LED intensity is set
>> + to. The percentage is calculated for each grouped LED via the
>> + equation below:
>> +
>> + led_brightness = brightness * color_intensity/max_brightness
>> +
>> + For additional details please refer to
>> + Documentation/leds/leds-class-multicolor.rst.
>> +
>> + The value of the color is from 0 to
>> + /sys/class/leds/<led>/max_brightness.
>> +
>> +What: /sys/class/leds/<led>/color_index
>> +Date: March 2020
>> +KernelVersion: 5.8
>> +Contact: Dan Murphy <dmurphy@ti.com>
>> +Description: read
>> + The color_index array, when read, will output the LED colors
>> + by name as they are indexed in the color_intensity array.
>> +
>> +What: /sys/class/leds/<led>/num_colors
>> +Date: March 2020
>> +KernelVersion: 5.8
>> +Contact: Dan Murphy <dmurphy@ti.com>
>> +Description: read
>> + The num_colors indicates the number of LEDs defined in the
>> + color_intensity and color_index arrays.
>> +
>> +What: /sys/class/leds/<led>/color_intensity
>> +Date: March 2020
>> +KernelVersion: 5.8
>> +Contact: Dan Murphy <dmurphy@ti.com>
>> +Description: read/write
>> + Intensity level for the LED color within the array.
>> + The intensities for each color must be entered based on the
>> + color_index array.
>> diff --git a/Documentation/leds/index.rst b/Documentation/leds/index.rst
>> index 060f4e485897..bc70c6aa7138 100644
>> --- a/Documentation/leds/index.rst
>> +++ b/Documentation/leds/index.rst
>> @@ -9,6 +9,7 @@ LEDs
>>
>> leds-class
>> leds-class-flash
>> + leds-class-multicolor
>> ledtrig-oneshot
>> ledtrig-transient
>> ledtrig-usbport
>> diff --git a/Documentation/leds/leds-class-multicolor.rst b/Documentation/leds/leds-class-multicolor.rst
>> new file mode 100644
>> index 000000000000..5bb004999248
>> --- /dev/null
>> +++ b/Documentation/leds/leds-class-multicolor.rst
>> @@ -0,0 +1,95 @@
>> +====================================
>> +Multi Color LED handling under Linux
>> +====================================
>> +
>> +Description
>> +===========
>> +The multi color class groups monochrome LEDs and allows controlling two
>> +aspects of the final combined color: hue and lightness. The former is
>> +controlled via the color_intensity array file and the latter is controlled
>> +via brightness file.
>> +
>> +For more details on hue and lightness notions please refer to
>> +https://en.wikipedia.org/wiki/CIECAM02.
>> +
>> +Multicolor Class Control
>> +========================
>> +The multicolor class presents files that groups the colors as indexes in an
>> +array. These files are children under the LED parent node created by the
>> +led_class framework. The led_class framework is documented in led-class.rst
>> +within this documentation directory.
>> +
>> +Each colored LED will be indexed under the color_* files. The order of the
>> +colors are arbitrary the color_index file can be read to determine the color
> Something wrong with punctuation here, or it is even a stylistic
> problem.
Ack and fixed
>
>> +to index value.
>> +
>> +The color_index file is an array that contains the string list of the colors as
>> +they are defined in each color_* array file.
>> +
>> +The color_intensity is an array that can be read or written to for the
>> +individual color intensities. All elements within this array must be written in
>> +order for the color LED intensities to be updated.
>> +
>> +The color_max_intensity is an array that can be read to indicate each color LED
>> +maximum intensity value.
>> +
>> +The num_color_leds file returns the total number of color LEDs that are
>> +presented in each color_* array.
>> +
>> +Directory Layout Example
>> +========================
>> +root:/sys/class/leds/multicolor:status# ls -lR
>> +-rw-r--r-- 1 root root 4096 Oct 19 16:16 brightness
>> +-r--r--r-- 1 root root 4096 Oct 19 16:16 color_index
>> +-rw-r--r-- 1 root root 4096 Oct 19 16:16 color_intensity
>> +-r--r--r-- 1 root root 4096 Oct 19 16:16 num_color_leds
>> +
>> +Multicolor Class Brightness Control
>> +===================================
>> +The multiclor class framework will calculate each monochrome LEDs intensity.
>> +
>> +The brightness level for each LED is calculated based on the color LED
>> +intensity setting divided by the parent max_brightness setting multiplied by
>> +the requested brightness.
>> +
>> +led_brightness = brightness * color_intensity/max_brightness
>> +
>> +Example:
>> +A user first writes the color_intensity file with the brightness levels
>> +that for each LED that is necessary to achieve a blueish violet output from a
>> +RGB LED group.
>> +
>> +cat /sys/class/leds/multicolor:status/color_index
>> +green blue red
>> +
>> +echo 43 226 138 > /sys/class/leds/multicolor:status/color_intensity
>> +
>> +red -
>> + intensity = 138
>> + max_brightness = 255
>> +green -
>> + intensity = 43
>> + max_brightness = 255
>> +blue -
>> + intensity = 226
>> + max_brightness = 255
>> +
>> +The user can control the brightness of that RGB group by writing the parent
> s/RGB/multicolor/
Ack and fixed throughout the doc
>
>> +'brightness' control. Assuming a parent max_brightness of 255 the user may want
>> +to dim the LED color group to half. The user would write a value of 128 to the
>> +parent brightness file then the values written to each LED will be adjusted
>> +base on this value
>> +
>> +cat /sys/class/leds/multicolor:status/max_brightness
>> +255
>> +echo 128 > /sys/class/leds/multicolor:status/brightness
>> +
>> +adjusted_red_value = 128 * 138/255 = 69
>> +adjusted_green_value = 128 * 43/255 = 21
>> +adjusted_blue_value = 128 * 226/255 = 113
>> +
>> +Reading the parent brightness file will return the current brightness value of
>> +the color LED group.
>> +
>> +cat /sys/class/leds/multicolor:status/brightness
>> +128
>> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
>> index d82f1dea3711..2e4611b25054 100644
>> --- a/drivers/leds/Kconfig
>> +++ b/drivers/leds/Kconfig
>> @@ -30,6 +30,16 @@ config LEDS_CLASS_FLASH
>> for the flash related features of a LED device. It can be built
>> as a module.
>>
>> +config LEDS_CLASS_MULTI_COLOR
>> + tristate "LED Multi Color LED Class Support"
>> + depends on LEDS_CLASS
>> + help
>> + This option enables the multicolor LED sysfs class in /sys/class/leds.
>> + It wraps LED class and adds multicolor LED specific sysfs attributes
>> + and kernel internal API to it. You'll need this to provide support
>> + for multicolor LEDs that are grouped together. This class is not
>> + intended for single color LEDs. It can be built as a module.
>> +
>> config LEDS_BRIGHTNESS_HW_CHANGED
>> bool "LED Class brightness_hw_changed attribute support"
>> depends on LEDS_CLASS
>> diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
>> index d7e1107753fb..310b5518783a 100644
>> --- a/drivers/leds/Makefile
>> +++ b/drivers/leds/Makefile
>> @@ -4,6 +4,7 @@
>> obj-$(CONFIG_NEW_LEDS) += led-core.o
>> obj-$(CONFIG_LEDS_CLASS) += led-class.o
>> obj-$(CONFIG_LEDS_CLASS_FLASH) += led-class-flash.o
>> +obj-$(CONFIG_LEDS_CLASS_MULTI_COLOR) += led-class-multicolor.o
>> obj-$(CONFIG_LEDS_TRIGGERS) += led-triggers.o
>>
>> # LED Platform Drivers
>> diff --git a/drivers/leds/led-class-multicolor.c b/drivers/leds/led-class-multicolor.c
>> new file mode 100644
>> index 000000000000..838b1d679647
>> --- /dev/null
>> +++ b/drivers/leds/led-class-multicolor.c
>> @@ -0,0 +1,206 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +// LED Multi Color class interface
>> +// Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/
>> +// Author: Dan Murphy <dmurphy@ti.com>
>> +
>> +#include <linux/device.h>
>> +#include <linux/init.h>
>> +#include <linux/led-class-multicolor.h>
>> +#include <linux/module.h>
>> +#include <linux/slab.h>
>> +#include <linux/uaccess.h>
>> +
>> +#include "leds.h"
>> +
>> +int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
>> + enum led_brightness brightness)
>> +{
>> + struct led_classdev *led_cdev = &mcled_cdev->led_cdev;
>> + int i;
>> +
>> + for (i = 0; i < mcled_cdev->num_colors; i++)
>> + mcled_cdev->multicolor_info[i].color_brightness = (brightness *
>> + mcled_cdev->multicolor_info[i].color_led_intensity /
>> + led_cdev->max_brightness);
> Why the need for brackets?
It was cleaner to read that was all.
>
>> +
>> + return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(led_mc_calc_color_components);
>> +
>> +static ssize_t color_intensity_store(struct device *dev,
>> + struct device_attribute *intensity_attr,
>> + const char *buf, size_t size)
>> +{
>> + struct led_classdev *led_cdev = dev_get_drvdata(dev);
>> + struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
>> + int nrchars, offset = 0;
>> + int intensity_value[LED_COLOR_ID_MAX];
>> + int i;
>> + ssize_t ret;
>> +
>> + mutex_lock(&led_cdev->led_access);
>> +
>> + for (i = 0; i < mcled_cdev->num_colors; i++) {
>> + ret = sscanf(buf + offset, "%i%n",
>> + &intensity_value[i], &nrchars);
>> + if (ret != 1) {
>> + dev_err(led_cdev->dev,
>> + "Incorrect number of LEDs expected %i values intensity was not applied\n",
>> + mcled_cdev->num_colors);
>> + goto err_out;
>> + }
>> + offset += nrchars;
>> + }
>> +
>> + for (i = 0; i < mcled_cdev->num_colors; i++)
>> + mcled_cdev->multicolor_info[i].color_led_intensity =
>> + intensity_value[i];
>> +
>> + led_set_brightness(led_cdev, led_cdev->brightness);
>> +err_out:
>> + ret = size;
>> + mutex_unlock(&led_cdev->led_access);
>> + return ret;
>> +}
>> +
>> +static ssize_t color_intensity_show(struct device *dev,
>> + struct device_attribute *intensity_attr,
>> + char *buf)
>> +{
>> + struct led_classdev *led_cdev = dev_get_drvdata(dev);
>> + struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
>> + int len = 0;
>> + int i;
>> +
>> + for (i = 0; i < mcled_cdev->num_colors; i++)
>> + len += sprintf(buf + len, "%d ",
>> + mcled_cdev->multicolor_info[i].color_led_intensity);
>> +
>> + len += sprintf(buf + len, "%s", "\n");
>> +
>> + return len;
>> +}
>> +static DEVICE_ATTR_RW(color_intensity);
>> +
>> +static ssize_t color_index_show(struct device *dev,
>> + struct device_attribute *color_index_attr,
>> + char *buf)
>> +{
>> + struct led_classdev *led_cdev = dev_get_drvdata(dev);
>> + struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
>> + int len = 0;
>> + int index;
>> + int i;
>> +
>> + for (i = 0; i < mcled_cdev->num_colors; i++) {
>> + index = mcled_cdev->multicolor_info[i].color_index;
>> + len += sprintf(buf + len, "%s ", led_colors[index]);
>> + }
>> +
>> + len += sprintf(buf + len, "%s", "\n");
>> +
>> + return len;
>> +}
>> +static DEVICE_ATTR_RO(color_index);
>> +
>> +static ssize_t num_colors_show(struct device *dev,
>> + struct device_attribute *max_intensity_attr,
>> + char *buf)
>> +{
>> + struct led_classdev *led_cdev = dev_get_drvdata(dev);
>> + struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
>> +
>> + return sprintf(buf, "%d\n", mcled_cdev->num_colors);
>> +}
>> +static DEVICE_ATTR_RO(num_colors);
>> +
>> +static struct attribute *led_multicolor_attrs[] = {
>> + &dev_attr_color_intensity.attr,
>> + &dev_attr_color_index.attr,
>> + &dev_attr_num_colors.attr,
>> + NULL,
>> +};
>> +ATTRIBUTE_GROUPS(led_multicolor);
>> +
>> +int led_classdev_multicolor_register_ext(struct device *parent,
>> + struct led_classdev_mc *mcled_cdev,
>> + struct led_init_data *init_data)
>> +{
>> + struct led_classdev *led_cdev;
>> +
>> + if (!mcled_cdev)
>> + return -EINVAL;
>> +
>> + if (!mcled_cdev->num_colors)
>> + return -EINVAL;
>> +
>> + led_cdev = &mcled_cdev->led_cdev;
>> + mcled_cdev->led_cdev.groups = led_multicolor_groups;
>> +
>> + return led_classdev_register_ext(parent, led_cdev, init_data);
>> +}
>> +EXPORT_SYMBOL_GPL(led_classdev_multicolor_register_ext);
>> +
>> +void led_classdev_multicolor_unregister(struct led_classdev_mc *mcled_cdev)
>> +{
>> + if (!mcled_cdev)
>> + return;
>> +
>> + led_classdev_unregister(&mcled_cdev->led_cdev);
>> +}
>> +EXPORT_SYMBOL_GPL(led_classdev_multicolor_unregister);
>> +
>> +static void devm_led_classdev_multicolor_release(struct device *dev, void *res)
>> +{
>> + led_classdev_multicolor_unregister(*(struct led_classdev_mc **)res);
>> +}
>> +
>> +int devm_led_classdev_multicolor_register_ext(struct device *parent,
>> + struct led_classdev_mc *mcled_cdev,
>> + struct led_init_data *init_data)
>> +{
>> + struct led_classdev_mc **dr;
>> + int ret;
>> +
>> + dr = devres_alloc(devm_led_classdev_multicolor_release,
>> + sizeof(*dr), GFP_KERNEL);
>> + if (!dr)
>> + return -ENOMEM;
>> +
>> + ret = led_classdev_multicolor_register_ext(parent, mcled_cdev,
>> + init_data);
>> + if (ret) {
>> + devres_free(dr);
>> + return ret;
>> + }
>> +
>> + *dr = mcled_cdev;
>> + devres_add(parent, dr);
>> +
>> + return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(devm_led_classdev_multicolor_register_ext);
>> +
>> +static int devm_led_classdev_multicolor_match(struct device *dev,
>> + void *res, void *data)
>> +{
>> + struct led_classdev_mc **p = res;
>> +
>> + if (WARN_ON(!p || !*p))
>> + return 0;
>> +
>> + return *p == data;
>> +}
>> +
>> +void devm_led_classdev_multicolor_unregister(struct device *dev,
>> + struct led_classdev_mc *mcled_cdev)
>> +{
>> + WARN_ON(devres_release(dev,
>> + devm_led_classdev_multicolor_release,
>> + devm_led_classdev_multicolor_match, mcled_cdev));
>> +}
>> +EXPORT_SYMBOL_GPL(devm_led_classdev_multicolor_unregister);
>> +
>> +MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
>> +MODULE_DESCRIPTION("Multi Color LED class interface");
>> +MODULE_LICENSE("GPL v2");
>> diff --git a/include/linux/led-class-multicolor.h b/include/linux/led-class-multicolor.h
>> new file mode 100644
>> index 000000000000..a6a3715c0d48
>> --- /dev/null
>> +++ b/include/linux/led-class-multicolor.h
>> @@ -0,0 +1,121 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/* LED Multicolor class interface
>> + * Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/
>> + */
>> +
>> +#ifndef __LINUX_MULTICOLOR_LEDS_H_INCLUDED
>> +#define __LINUX_MULTICOLOR_LEDS_H_INCLUDED
>> +
>> +#include <linux/leds.h>
>> +#include <dt-bindings/leds/common.h>
>> +
>> +struct led_multicolor_info {
>> + int color_index;
>> + int color_brightness;
>> + int color_led_intensity;
>> + int color_channel;
>> +};
>> +
>> +struct led_classdev_mc {
>> + /* led class device */
>> + struct led_classdev led_cdev;
>> + int num_colors;
>> +
>> + struct led_multicolor_info multicolor_info[LED_COLOR_ID_MAX];
> I still have a problem with this fixed array that can grow for each
> driver as new color identifiers are added to the LED core. Not
> mentioning waste of memory due to unused colors. This is bad design.
I did try to do the dynamic allocation in both the device driver and
framework
When I used this
led->mc_cdev.multitest_info = devm_kzalloc(&priv->client->dev,
struct_size(&led->mc_cdev, multitest_info, num_colors),
GFP_KERNEL);
The compiler complained.
drivers/leds/leds-lp50xx.c: In function ‘lp50xx_probe_dt’:
drivers/leds/leds-lp50xx.c:669:31: error: invalid use of flexible array
member
669 | led->mc_cdev.multitest_info = devm_kzalloc(&priv->client->dev,
| ^
The pointer was defined as
struct led_multicolor_info *multitest_info[];
The led_classdev_mc structure is allocated in the device driver
structure. This struct contains the multicolor_info structure.
Unless I am doing this incorrectly.
Dan
Dan
^ permalink raw reply [flat|nested] 36+ messages in thread
* Re: [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-02 20:42 ` [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition Dan Murphy
` (2 preceding siblings ...)
2020-04-06 19:25 ` Jacek Anaszewski
@ 2020-04-07 21:08 ` Jacek Anaszewski
2020-04-08 16:33 ` Dan Murphy
2020-04-08 16:35 ` Dan Murphy
2020-04-09 5:25 ` Vesa Jääskeläinen
5 siblings, 1 reply; 36+ messages in thread
From: Jacek Anaszewski @ 2020-04-07 21:08 UTC (permalink / raw)
To: Dan Murphy, pavel; +Cc: linux-leds, linux-kernel
Dan,
One more nit below.
On 4/2/20 10:42 PM, Dan Murphy wrote:
> Introduce a multicolor class that groups colored LEDs
> within a LED node.
>
> The multi color class groups monochrome LEDs and allows controlling two
> aspects of the final combined color: hue and lightness. The former is
> controlled via <color>_intensity files and the latter is controlled
> via brightness file.
[...]
> # LED Platform Drivers
> diff --git a/drivers/leds/led-class-multicolor.c b/drivers/leds/led-class-multicolor.c
> new file mode 100644
> index 000000000000..838b1d679647
> --- /dev/null
> +++ b/drivers/leds/led-class-multicolor.c
> @@ -0,0 +1,206 @@
> +// SPDX-License-Identifier: GPL-2.0
> +// LED Multi Color class interface
> +// Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/
> +// Author: Dan Murphy <dmurphy@ti.com>
> +
> +#include <linux/device.h>
> +#include <linux/init.h>
> +#include <linux/led-class-multicolor.h>
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <linux/uaccess.h>
> +
> +#include "leds.h"
> +
> +int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
> + enum led_brightness brightness)
> +{
> + struct led_classdev *led_cdev = &mcled_cdev->led_cdev;
> + int i;
> +
> + for (i = 0; i < mcled_cdev->num_colors; i++)
> + mcled_cdev->multicolor_info[i].color_brightness = (brightness *
If you passed temporary array for collecting calculated brightness
items to this function then you could remove this color_brightness
field from struct multicolor_info.
> + mcled_cdev->multicolor_info[i].color_led_intensity /
> + led_cdev->max_brightness);
> +
> + return 0;
[...]
> +MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
> +MODULE_DESCRIPTION("Multi Color LED class interface");
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/led-class-multicolor.h b/include/linux/led-class-multicolor.h
> new file mode 100644
> index 000000000000..a6a3715c0d48
> --- /dev/null
> +++ b/include/linux/led-class-multicolor.h
> @@ -0,0 +1,121 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/* LED Multicolor class interface
> + * Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/
> + */
> +
> +#ifndef __LINUX_MULTICOLOR_LEDS_H_INCLUDED
> +#define __LINUX_MULTICOLOR_LEDS_H_INCLUDED
> +
> +#include <linux/leds.h>
> +#include <dt-bindings/leds/common.h>
> +
> +struct led_multicolor_info {
s/led_multicolor_info/led_mc_subled/ ?
> + int color_index;
> + int color_brightness;
This should not be needed.
> + int color_led_intensity;
> + int color_channel;
> +};
> +
> +struct led_classdev_mc {
> + /* led class device */
> + struct led_classdev led_cdev;
> + int num_colors;
> +
> + struct led_multicolor_info multicolor_info[LED_COLOR_ID_MAX];
> +};
--
Best regards,
Jacek Anaszewski
^ permalink raw reply [flat|nested] 36+ messages in thread* Re: [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-07 21:08 ` Jacek Anaszewski
@ 2020-04-08 16:33 ` Dan Murphy
0 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-08 16:33 UTC (permalink / raw)
To: Jacek Anaszewski, pavel; +Cc: linux-leds, linux-kernel
Jacek
On 4/7/20 4:08 PM, Jacek Anaszewski wrote:
> Dan,
>
> One more nit below.
>
> On 4/2/20 10:42 PM, Dan Murphy wrote:
>> Introduce a multicolor class that groups colored LEDs
>> within a LED node.
>>
>> The multi color class groups monochrome LEDs and allows controlling two
>> aspects of the final combined color: hue and lightness. The former is
>> controlled via <color>_intensity files and the latter is controlled
>> via brightness file.
> [...]
>> # LED Platform Drivers
>> diff --git a/drivers/leds/led-class-multicolor.c b/drivers/leds/led-class-multicolor.c
>> new file mode 100644
>> index 000000000000..838b1d679647
>> --- /dev/null
>> +++ b/drivers/leds/led-class-multicolor.c
>> @@ -0,0 +1,206 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +// LED Multi Color class interface
>> +// Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/
>> +// Author: Dan Murphy <dmurphy@ti.com>
>> +
>> +#include <linux/device.h>
>> +#include <linux/init.h>
>> +#include <linux/led-class-multicolor.h>
>> +#include <linux/module.h>
>> +#include <linux/slab.h>
>> +#include <linux/uaccess.h>
>> +
>> +#include "leds.h"
>> +
>> +int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
>> + enum led_brightness brightness)
>> +{
>> + struct led_classdev *led_cdev = &mcled_cdev->led_cdev;
>> + int i;
>> +
>> + for (i = 0; i < mcled_cdev->num_colors; i++)
>> + mcled_cdev->multicolor_info[i].color_brightness = (brightness *
> If you passed temporary array for collecting calculated brightness
> items to this function then you could remove this color_brightness
> field from struct multicolor_info.
I thought about doing it that way but I liked how each LEDs properties
were stored in a single element in the array.
There would be no issues with referencing the array element and knowing
everything about the specific LED like the
intensity, brightness, output channel and ID. This eliminates any need
for a channel map or mapping brightness to IDs or channels.
Dan
^ permalink raw reply [flat|nested] 36+ messages in thread
* Re: [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-02 20:42 ` [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition Dan Murphy
` (3 preceding siblings ...)
2020-04-07 21:08 ` Jacek Anaszewski
@ 2020-04-08 16:35 ` Dan Murphy
2020-04-14 13:23 ` Dan Murphy
2020-04-09 5:25 ` Vesa Jääskeläinen
5 siblings, 1 reply; 36+ messages in thread
From: Dan Murphy @ 2020-04-08 16:35 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel
Pavel
On 4/2/20 3:42 PM, Dan Murphy wrote:
> Introduce a multicolor class that groups colored LEDs
> within a LED node.
>
> The multi color class groups monochrome LEDs and allows controlling two
> aspects of the final combined color: hue and lightness. The former is
> controlled via <color>_intensity files and the latter is controlled
> via brightness file.
When you get a chance I would like to get your review on this patch as
well before I submit v20
Dan
^ permalink raw reply [flat|nested] 36+ messages in thread* Re: [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-08 16:35 ` Dan Murphy
@ 2020-04-14 13:23 ` Dan Murphy
0 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-14 13:23 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel
Pavel
On 4/8/20 11:35 AM, Dan Murphy wrote:
> Pavel
>
> On 4/2/20 3:42 PM, Dan Murphy wrote:
>> Introduce a multicolor class that groups colored LEDs
>> within a LED node.
>>
>> The multi color class groups monochrome LEDs and allows controlling two
>> aspects of the final combined color: hue and lightness. The former is
>> controlled via <color>_intensity files and the latter is controlled
>> via brightness file.
>
> When you get a chance I would like to get your review on this patch as
> well before I submit v20
>
Have you had a chance to review the code? I want to be able to post the
next version but want to make sure there are currently no other major
changes.
Dan
> Dan
>
^ permalink raw reply [flat|nested] 36+ messages in thread
* Re: [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-02 20:42 ` [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition Dan Murphy
` (4 preceding siblings ...)
2020-04-08 16:35 ` Dan Murphy
@ 2020-04-09 5:25 ` Vesa Jääskeläinen
2020-04-14 13:21 ` Dan Murphy
5 siblings, 1 reply; 36+ messages in thread
From: Vesa Jääskeläinen @ 2020-04-09 5:25 UTC (permalink / raw)
To: Dan Murphy, jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel
Hi,
On 2.4.2020 23.42, Dan Murphy wrote:
> Introduce a multicolor class that groups colored LEDs
> within a LED node.
>
> The multi color class groups monochrome LEDs and allows controlling two
> aspects of the final combined color: hue and lightness. The former is
> controlled via <color>_intensity files and the latter is controlled
> via brightness file.
>
> Signed-off-by: Dan Murphy <dmurphy@ti.com>
> ---
> .../ABI/testing/sysfs-class-led-multicolor | 42 ++++
> Documentation/leds/index.rst | 1 +
> Documentation/leds/leds-class-multicolor.rst | 95 ++++++++
> drivers/leds/Kconfig | 10 +
> drivers/leds/Makefile | 1 +
> drivers/leds/led-class-multicolor.c | 206 ++++++++++++++++++
> include/linux/led-class-multicolor.h | 121 ++++++++++
> 7 files changed, 476 insertions(+)
> create mode 100644 Documentation/ABI/testing/sysfs-class-led-multicolor
> create mode 100644 Documentation/leds/leds-class-multicolor.rst
> create mode 100644 drivers/leds/led-class-multicolor.c
> create mode 100644 include/linux/led-class-multicolor.h
>
> diff --git a/Documentation/ABI/testing/sysfs-class-led-multicolor b/Documentation/ABI/testing/sysfs-class-led-multicolor
> new file mode 100644
> index 000000000000..1f50324d24fd
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-class-led-multicolor
> @@ -0,0 +1,42 @@
> +What: /sys/class/leds/<led>/brightness
> +Date: March 2020
> +KernelVersion: 5.8
> +Contact: Dan Murphy <dmurphy@ti.com>
> +Description: read/write
> + Writing to this file will update all LEDs within the group to a
> + calculated percentage of what each color LED intensity is set
> + to. The percentage is calculated for each grouped LED via the
> + equation below:
> +
> + led_brightness = brightness * color_intensity/max_brightness
> +
> + For additional details please refer to
> + Documentation/leds/leds-class-multicolor.rst.
> +
> + The value of the color is from 0 to
> + /sys/class/leds/<led>/max_brightness.
> +
> +What: /sys/class/leds/<led>/color_index
> +Date: March 2020
> +KernelVersion: 5.8
> +Contact: Dan Murphy <dmurphy@ti.com>
> +Description: read
> + The color_index array, when read, will output the LED colors
> + by name as they are indexed in the color_intensity array.
> +
> +What: /sys/class/leds/<led>/num_colors
> +Date: March 2020
> +KernelVersion: 5.8
> +Contact: Dan Murphy <dmurphy@ti.com>
> +Description: read
> + The num_colors indicates the number of LEDs defined in the
> + color_intensity and color_index arrays.
> +
> +What: /sys/class/leds/<led>/color_intensity
> +Date: March 2020
> +KernelVersion: 5.8
> +Contact: Dan Murphy <dmurphy@ti.com>
> +Description: read/write
> + Intensity level for the LED color within the array.
> + The intensities for each color must be entered based on the
> + color_index array.
For what it is worth --
I see that this interface covers our use cases and I assume that GPIO
LED and PWM LED drivers can be implemented for this after this set is
integrated.
Thanks,
Vesa Jääskeläinen
^ permalink raw reply [flat|nested] 36+ messages in thread* Re: [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition
2020-04-09 5:25 ` Vesa Jääskeläinen
@ 2020-04-14 13:21 ` Dan Murphy
0 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-14 13:21 UTC (permalink / raw)
To: Vesa Jääskeläinen, jacek.anaszewski, pavel
Cc: linux-leds, linux-kernel
Vesa
On 4/9/20 12:25 AM, Vesa Jääskeläinen wrote:
> Hi,
>
> On 2.4.2020 23.42, Dan Murphy wrote:
>> Introduce a multicolor class that groups colored LEDs
>> within a LED node.
>>
>> The multi color class groups monochrome LEDs and allows controlling two
>> aspects of the final combined color: hue and lightness. The former is
>> controlled via <color>_intensity files and the latter is controlled
>> via brightness file.
>>
>> Signed-off-by: Dan Murphy <dmurphy@ti.com>
>> ---
>> .../ABI/testing/sysfs-class-led-multicolor | 42 ++++
>> Documentation/leds/index.rst | 1 +
>> Documentation/leds/leds-class-multicolor.rst | 95 ++++++++
>> drivers/leds/Kconfig | 10 +
>> drivers/leds/Makefile | 1 +
>> drivers/leds/led-class-multicolor.c | 206 ++++++++++++++++++
>> include/linux/led-class-multicolor.h | 121 ++++++++++
>> 7 files changed, 476 insertions(+)
>> create mode 100644
>> Documentation/ABI/testing/sysfs-class-led-multicolor
>> create mode 100644 Documentation/leds/leds-class-multicolor.rst
>> create mode 100644 drivers/leds/led-class-multicolor.c
>> create mode 100644 include/linux/led-class-multicolor.h
>>
>> diff --git a/Documentation/ABI/testing/sysfs-class-led-multicolor
>> b/Documentation/ABI/testing/sysfs-class-led-multicolor
>> new file mode 100644
>> index 000000000000..1f50324d24fd
>> --- /dev/null
>> +++ b/Documentation/ABI/testing/sysfs-class-led-multicolor
>> @@ -0,0 +1,42 @@
>> +What: /sys/class/leds/<led>/brightness
>> +Date: March 2020
>> +KernelVersion: 5.8
>> +Contact: Dan Murphy <dmurphy@ti.com>
>> +Description: read/write
>> + Writing to this file will update all LEDs within the group to a
>> + calculated percentage of what each color LED intensity is set
>> + to. The percentage is calculated for each grouped LED via the
>> + equation below:
>> +
>> + led_brightness = brightness * color_intensity/max_brightness
>> +
>> + For additional details please refer to
>> + Documentation/leds/leds-class-multicolor.rst.
>> +
>> + The value of the color is from 0 to
>> + /sys/class/leds/<led>/max_brightness.
>> +
>> +What: /sys/class/leds/<led>/color_index
>> +Date: March 2020
>> +KernelVersion: 5.8
>> +Contact: Dan Murphy <dmurphy@ti.com>
>> +Description: read
>> + The color_index array, when read, will output the LED colors
>> + by name as they are indexed in the color_intensity array.
>> +
>> +What: /sys/class/leds/<led>/num_colors
>> +Date: March 2020
>> +KernelVersion: 5.8
>> +Contact: Dan Murphy <dmurphy@ti.com>
>> +Description: read
>> + The num_colors indicates the number of LEDs defined in the
>> + color_intensity and color_index arrays.
>> +
>> +What: /sys/class/leds/<led>/color_intensity
>> +Date: March 2020
>> +KernelVersion: 5.8
>> +Contact: Dan Murphy <dmurphy@ti.com>
>> +Description: read/write
>> + Intensity level for the LED color within the array.
>> + The intensities for each color must be entered based on the
>> + color_index array.
>
> For what it is worth --
>
> I see that this interface covers our use cases and I assume that GPIO
> LED and PWM LED drivers can be implemented for this after this set is
> integrated.
>
Thank you for looking
Dan
> Thanks,
> Vesa Jääskeläinen
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH v19 05/18] dt: bindings: lp50xx: Introduce the lp50xx family of RGB drivers
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (3 preceding siblings ...)
2020-04-02 20:42 ` [PATCH v19 04/18] leds: multicolor: Introduce a multicolor class definition Dan Murphy
@ 2020-04-02 20:42 ` Dan Murphy
2020-04-02 20:42 ` [PATCH v19 06/18] leds: lp50xx: Add the LP50XX family of the RGB LED driver Dan Murphy
` (12 subsequent siblings)
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:42 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Introduce the bindings for the Texas Instruments LP5036, LP5030, LP5024,
LP5018, LP5012 and LP5009 RGB LED device driver. The LP5036/30/24/18/12/9
can control RGB LEDs individually or as part of a control bank group.
These devices have the ability to adjust the mixing control for the RGB
LEDs to obtain different colors independent of the overall brightness of
the LED grouping.
Datasheet:
http://www.ti.com/lit/ds/symlink/lp5012.pdf
http://www.ti.com/lit/ds/symlink/lp5024.pdf
http://www.ti.com/lit/ds/symlink/lp5036.pdf
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
.../devicetree/bindings/leds/leds-lp50xx.txt | 148 ++++++++++++++++++
1 file changed, 148 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/leds-lp50xx.txt
diff --git a/Documentation/devicetree/bindings/leds/leds-lp50xx.txt b/Documentation/devicetree/bindings/leds/leds-lp50xx.txt
new file mode 100644
index 000000000000..291d418642e0
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-lp50xx.txt
@@ -0,0 +1,148 @@
+* Texas Instruments - LP5009/12/18/24/30/36 RGB LED driver
+
+The LP50XX is multi-channel, I2C RGB LED Drivers that can group RGB LEDs into
+a LED group or control them individually.
+
+The difference in these RGB LED drivers is the number of supported RGB modules.
+
+Required parent properties:
+ - compatible:
+ "ti,lp5009"
+ "ti,lp5012"
+ "ti,lp5018"
+ "ti,lp5024"
+ "ti,lp5030"
+ "ti,lp5036"
+ - reg : I2C slave address
+ lp5009/12 - 0x14, 0x15, 0x16, 0x17
+ lp5018/24 - 0x28, 0x29, 0x2a, 0x2b
+ lp5030/36 - 0x30, 0x31, 0x32, 0x33
+ - #address-cells : 1
+ - #size-cells : 0
+
+Optional parent properties:
+ - enable-gpios : gpio pin to enable/disable the device.
+ - vled-supply : LED supply
+
+Required child properties:
+ - #address-cells : 1
+ - #size-cells : 0
+ - reg : This is the LED module number.
+ - color : Must be LED_COLOR_ID_MULTI
+ - function : see Documentation/devicetree/bindings/leds/common.txt
+
+Required child properties only if LED modules will be banked:
+ - ti,led-bank : This property denotes the LED module numbers that will
+ be controlled as a single RGB cluster. Each LED module
+ number will be controlled by a single LED class instance.
+ There can only be one instance of the ti,led-bank
+ property for each device node.
+
+Required grandchildren properties:
+ - reg : A single entry denoting the LED output that controls
+ the monochrome LED.
+ - color : see Documentation/devicetree/bindings/leds/common.txt
+ - led-sources : see Documentation/devicetree/bindings/leds/common.txt
+
+The LED outputs associated with the LED modules are defined in Table 1 of the
+corresponding data sheets.
+
+LP5009 - 3 Total RGB cluster LED outputs 0-2
+LP5012 - 4 Total RGB cluster LED outputs 0-3
+LP5018 - 6 Total RGB cluster LED outputs 0-5
+LP5024 - 8 Total RGB cluster LED outputs 0-7
+LP5030 - 10 Total RGB cluster LED outputs 0-9
+LP5036 - 12 Total RGB cluster LED outputs 0-11
+
+Optional child properties:
+ - label : see Documentation/devicetree/bindings/leds/common.txt
+ - linux,default-trigger :
+ see Documentation/devicetree/bindings/leds/common.txt
+
+Examples:
+led-controller@29 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "ti,lp5024";
+ reg = <0x29>;
+ enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
+ vled-supply = <&vmmcsd_fixed>;
+
+ multi-led@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+ color = <LED_COLOR_ID_MULTI>;
+ function = LED_FUNCTION_STATUS;
+
+ led@3 {
+ reg = <3>;
+ color = <LED_COLOR_ID_RED>;
+ };
+
+ led@4 {
+ reg = <4>;
+ color = <LED_COLOR_ID_GREEN>;
+ };
+
+ led@5 {
+ reg = <5>;
+ color = <LED_COLOR_ID_BLUE>;
+ };
+ };
+
+ multi-led@2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <2>;
+ color = <LED_COLOR_ID_MULTI>;
+ function = LED_FUNCTION_STANDBY;
+ ti,led-bank = <2 3 5>;
+
+ led@6 {
+ reg = <0x6>;
+ color = <LED_COLOR_ID_RED>;
+ led-sources = <6 9 15>;
+ };
+
+ led@7 {
+ reg = <0x7>;
+ color = <LED_COLOR_ID_GREEN>;
+ led-sources = <7 10 16>;
+ };
+
+ led@8 {
+ reg = <0x8>;
+ color = <LED_COLOR_ID_BLUE>;
+ led-sources = <8 11 17>;
+ };
+ };
+
+ multi-led@4 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <4>;
+ color = <LED_COLOR_ID_MULTI>;
+ function = LED_FUNCTION_ACTIVITY;
+
+ led@12 {
+ reg = <12>;
+ color = <LED_COLOR_ID_RED>;
+ };
+
+ led@13 {
+ reg = <13>;
+ color = <LED_COLOR_ID_GREEN>;
+ };
+
+ led@14 {
+ reg = <14>;
+ color = <LED_COLOR_ID_BLUE>;
+ };
+ };
+};
+
+For more product information please see the link below:
+http://www.ti.com/lit/ds/symlink/lp5012.pdf
+http://www.ti.com/lit/ds/symlink/lp5024.pdf
+http://www.ti.com/lit/ds/symlink/lp5036.pdf
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 06/18] leds: lp50xx: Add the LP50XX family of the RGB LED driver
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (4 preceding siblings ...)
2020-04-02 20:42 ` [PATCH v19 05/18] dt: bindings: lp50xx: Introduce the lp50xx family of RGB drivers Dan Murphy
@ 2020-04-02 20:42 ` Dan Murphy
2020-04-02 20:43 ` [PATCH v19 07/18] dt: bindings: lp55xx: Be consistent in the document with LED acronym Dan Murphy
` (11 subsequent siblings)
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:42 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Introduce the LP5036/30/24/18/12/9 RGB LED driver.
The difference in these parts are the number of
LED outputs where the:
LP5036 can control 36 LEDs
LP5030 can control 30 LEDs
LP5024 can control 24 LEDs
LP5018 can control 18 LEDs
LP5012 can control 12 LEDs
LP5009 can control 9 LEDs
The device has the ability to group LED output into control banks
so that multiple LED banks can be controlled with the same mixing and
brightness. Inversely the LEDs can also be controlled independently.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
drivers/leds/Kconfig | 11 +
drivers/leds/Makefile | 1 +
drivers/leds/leds-lp50xx.c | 795 +++++++++++++++++++++++++++++++++++++
3 files changed, 807 insertions(+)
create mode 100644 drivers/leds/leds-lp50xx.c
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 2e4611b25054..fa2780ac03b2 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -363,6 +363,17 @@ config LEDS_LP3952
To compile this driver as a module, choose M here: the
module will be called leds-lp3952.
+config LEDS_LP50XX
+ tristate "LED Support for TI LP5036/30/24/18/12/9 LED driver chip"
+ depends on LEDS_CLASS && REGMAP_I2C
+ depends on LEDS_CLASS_MULTI_COLOR
+ help
+ If you say yes here you get support for the Texas Instruments
+ LP5036, LP5030, LP5024, LP5018, LP5012 and LP5009 LED driver.
+
+ To compile this driver as a module, choose M here: the
+ module will be called leds-lp50xx.
+
config LEDS_LP55XX_COMMON
tristate "Common Driver for TI/National LP5521/5523/55231/5562/8501"
depends on LEDS_LP5521 || LEDS_LP5523 || LEDS_LP5562 || LEDS_LP8501
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 310b5518783a..b5305b7d43fb 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_LEDS_GPIO_REGISTER) += leds-gpio-register.o
obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o
obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o
obj-$(CONFIG_LEDS_LP3952) += leds-lp3952.o
+obj-$(CONFIG_LEDS_LP50XX) += leds-lp50xx.o
obj-$(CONFIG_LEDS_LP55XX_COMMON) += leds-lp55xx-common.o
obj-$(CONFIG_LEDS_LP5521) += leds-lp5521.o
obj-$(CONFIG_LEDS_LP5523) += leds-lp5523.o
diff --git a/drivers/leds/leds-lp50xx.c b/drivers/leds/leds-lp50xx.c
new file mode 100644
index 000000000000..a7e555711360
--- /dev/null
+++ b/drivers/leds/leds-lp50xx.c
@@ -0,0 +1,795 @@
+// SPDX-License-Identifier: GPL-2.0
+// TI LP50XX LED chip family driver
+// Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <uapi/linux/uleds.h>
+
+#include <linux/led-class-multicolor.h>
+
+#include "leds.h"
+
+#define LP50XX_DEV_CFG0 0x00
+#define LP50XX_DEV_CFG1 0x01
+#define LP50XX_LED_CFG0 0x02
+
+/* LP5009 and LP5012 registers */
+#define LP5012_BNK_BRT 0x03
+#define LP5012_BNKA_CLR 0x04
+#define LP5012_BNKB_CLR 0x05
+#define LP5012_BNKC_CLR 0x06
+#define LP5012_LED0_BRT 0x07
+#define LP5012_LED1_BRT 0x08
+#define LP5012_LED2_BRT 0x09
+#define LP5012_LED3_BRT 0x0a
+#define LP5012_OUT0_CLR 0x0b
+#define LP5012_OUT1_CLR 0x0c
+#define LP5012_OUT2_CLR 0x0d
+#define LP5012_OUT3_CLR 0x0e
+#define LP5012_OUT4_CLR 0x0f
+#define LP5012_OUT5_CLR 0x10
+#define LP5012_OUT6_CLR 0x11
+#define LP5012_OUT7_CLR 0x12
+#define LP5012_OUT8_CLR 0x13
+#define LP5012_OUT9_CLR 0x14
+#define LP5012_OUT10_CLR 0x15
+#define LP5012_OUT11_CLR 0x16
+#define LP5012_RESET 0x17
+
+/* LP5018 and LP5024 registers */
+#define LP5024_BNK_BRT 0x03
+#define LP5024_BNKA_CLR 0x04
+#define LP5024_BNKB_CLR 0x05
+#define LP5024_BNKC_CLR 0x06
+#define LP5024_LED0_BRT 0x07
+#define LP5024_LED1_BRT 0x08
+#define LP5024_LED2_BRT 0x09
+#define LP5024_LED3_BRT 0x0a
+#define LP5024_LED4_BRT 0x0b
+#define LP5024_LED5_BRT 0x0c
+#define LP5024_LED6_BRT 0x0d
+#define LP5024_LED7_BRT 0x0e
+
+#define LP5024_OUT0_CLR 0x0f
+#define LP5024_OUT1_CLR 0x10
+#define LP5024_OUT2_CLR 0x11
+#define LP5024_OUT3_CLR 0x12
+#define LP5024_OUT4_CLR 0x13
+#define LP5024_OUT5_CLR 0x14
+#define LP5024_OUT6_CLR 0x15
+#define LP5024_OUT7_CLR 0x16
+#define LP5024_OUT8_CLR 0x17
+#define LP5024_OUT9_CLR 0x18
+#define LP5024_OUT10_CLR 0x19
+#define LP5024_OUT11_CLR 0x1a
+#define LP5024_OUT12_CLR 0x1b
+#define LP5024_OUT13_CLR 0x1c
+#define LP5024_OUT14_CLR 0x1d
+#define LP5024_OUT15_CLR 0x1e
+#define LP5024_OUT16_CLR 0x1f
+#define LP5024_OUT17_CLR 0x20
+#define LP5024_OUT18_CLR 0x21
+#define LP5024_OUT19_CLR 0x22
+#define LP5024_OUT20_CLR 0x23
+#define LP5024_OUT21_CLR 0x24
+#define LP5024_OUT22_CLR 0x25
+#define LP5024_OUT23_CLR 0x26
+#define LP5024_RESET 0x27
+
+/* LP5030 and LP5036 registers */
+#define LP5036_LED_CFG1 0x03
+#define LP5036_BNK_BRT 0x04
+#define LP5036_BNKA_CLR 0x05
+#define LP5036_BNKB_CLR 0x06
+#define LP5036_BNKC_CLR 0x07
+#define LP5036_LED0_BRT 0x08
+#define LP5036_LED1_BRT 0x09
+#define LP5036_LED2_BRT 0x0a
+#define LP5036_LED3_BRT 0x0b
+#define LP5036_LED4_BRT 0x0c
+#define LP5036_LED5_BRT 0x0d
+#define LP5036_LED6_BRT 0x0e
+#define LP5036_LED7_BRT 0x0f
+#define LP5036_LED8_BRT 0x10
+#define LP5036_LED9_BRT 0x11
+#define LP5036_LED10_BRT 0x12
+#define LP5036_LED11_BRT 0x13
+
+#define LP5036_OUT0_CLR 0x14
+#define LP5036_OUT1_CLR 0x15
+#define LP5036_OUT2_CLR 0x16
+#define LP5036_OUT3_CLR 0x17
+#define LP5036_OUT4_CLR 0x18
+#define LP5036_OUT5_CLR 0x19
+#define LP5036_OUT6_CLR 0x1a
+#define LP5036_OUT7_CLR 0x1b
+#define LP5036_OUT8_CLR 0x1c
+#define LP5036_OUT9_CLR 0x1d
+#define LP5036_OUT10_CLR 0x1e
+#define LP5036_OUT11_CLR 0x1f
+#define LP5036_OUT12_CLR 0x20
+#define LP5036_OUT13_CLR 0x21
+#define LP5036_OUT14_CLR 0x22
+#define LP5036_OUT15_CLR 0x23
+#define LP5036_OUT16_CLR 0x24
+#define LP5036_OUT17_CLR 0x25
+#define LP5036_OUT18_CLR 0x26
+#define LP5036_OUT19_CLR 0x27
+#define LP5036_OUT20_CLR 0x28
+#define LP5036_OUT21_CLR 0x29
+#define LP5036_OUT22_CLR 0x2a
+#define LP5036_OUT23_CLR 0x2b
+#define LP5036_OUT24_CLR 0x2c
+#define LP5036_OUT25_CLR 0x2d
+#define LP5036_OUT26_CLR 0x2e
+#define LP5036_OUT27_CLR 0x2f
+#define LP5036_OUT28_CLR 0x30
+#define LP5036_OUT29_CLR 0x31
+#define LP5036_OUT30_CLR 0x32
+#define LP5036_OUT31_CLR 0x33
+#define LP5036_OUT32_CLR 0x34
+#define LP5036_OUT33_CLR 0x35
+#define LP5036_OUT34_CLR 0x36
+#define LP5036_OUT35_CLR 0x37
+#define LP5036_RESET 0x38
+
+#define LP50XX_SW_RESET 0xff
+#define LP50XX_CHIP_EN BIT(6)
+
+/* There are 3 LED outputs per bank */
+#define LP50XX_LEDS_PER_MODULE 3
+
+#define LP5009_MAX_LED_MODULES 2
+#define LP5012_MAX_LED_MODULES 4
+#define LP5018_MAX_LED_MODULES 6
+#define LP5024_MAX_LED_MODULES 8
+#define LP5030_MAX_LED_MODULES 10
+#define LP5036_MAX_LED_MODULES 12
+
+#define LP5009_MAX_LEDS (LP5009_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE)
+#define LP5012_MAX_LEDS (LP5012_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE)
+#define LP5018_MAX_LEDS (LP5018_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE)
+#define LP5024_MAX_LEDS (LP5024_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE)
+#define LP5030_MAX_LEDS (LP5030_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE)
+#define LP5036_MAX_LEDS (LP5036_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE)
+
+static const struct reg_default lp5012_reg_defs[] = {
+ {LP50XX_DEV_CFG0, 0x0},
+ {LP50XX_DEV_CFG1, 0x3c},
+ {LP50XX_LED_CFG0, 0x0},
+ {LP5012_BNK_BRT, 0xff},
+ {LP5012_BNKA_CLR, 0x0f},
+ {LP5012_BNKB_CLR, 0x0f},
+ {LP5012_BNKC_CLR, 0x0f},
+ {LP5012_LED0_BRT, 0x0f},
+ {LP5012_LED1_BRT, 0xff},
+ {LP5012_LED2_BRT, 0xff},
+ {LP5012_LED3_BRT, 0xff},
+ {LP5012_OUT0_CLR, 0x0f},
+ {LP5012_OUT1_CLR, 0x00},
+ {LP5012_OUT2_CLR, 0x00},
+ {LP5012_OUT3_CLR, 0x00},
+ {LP5012_OUT4_CLR, 0x00},
+ {LP5012_OUT5_CLR, 0x00},
+ {LP5012_OUT6_CLR, 0x00},
+ {LP5012_OUT7_CLR, 0x00},
+ {LP5012_OUT8_CLR, 0x00},
+ {LP5012_OUT9_CLR, 0x00},
+ {LP5012_OUT10_CLR, 0x00},
+ {LP5012_OUT11_CLR, 0x00},
+ {LP5012_RESET, 0x00}
+};
+
+static const struct reg_default lp5024_reg_defs[] = {
+ {LP50XX_DEV_CFG0, 0x0},
+ {LP50XX_DEV_CFG1, 0x3c},
+ {LP50XX_LED_CFG0, 0x0},
+ {LP5024_BNK_BRT, 0xff},
+ {LP5024_BNKA_CLR, 0x0f},
+ {LP5024_BNKB_CLR, 0x0f},
+ {LP5024_BNKC_CLR, 0x0f},
+ {LP5024_LED0_BRT, 0x0f},
+ {LP5024_LED1_BRT, 0xff},
+ {LP5024_LED2_BRT, 0xff},
+ {LP5024_LED3_BRT, 0xff},
+ {LP5024_LED4_BRT, 0xff},
+ {LP5024_LED5_BRT, 0xff},
+ {LP5024_LED6_BRT, 0xff},
+ {LP5024_LED7_BRT, 0xff},
+ {LP5024_OUT0_CLR, 0x0f},
+ {LP5024_OUT1_CLR, 0x00},
+ {LP5024_OUT2_CLR, 0x00},
+ {LP5024_OUT3_CLR, 0x00},
+ {LP5024_OUT4_CLR, 0x00},
+ {LP5024_OUT5_CLR, 0x00},
+ {LP5024_OUT6_CLR, 0x00},
+ {LP5024_OUT7_CLR, 0x00},
+ {LP5024_OUT8_CLR, 0x00},
+ {LP5024_OUT9_CLR, 0x00},
+ {LP5024_OUT10_CLR, 0x00},
+ {LP5024_OUT11_CLR, 0x00},
+ {LP5024_OUT12_CLR, 0x00},
+ {LP5024_OUT13_CLR, 0x00},
+ {LP5024_OUT14_CLR, 0x00},
+ {LP5024_OUT15_CLR, 0x00},
+ {LP5024_OUT16_CLR, 0x00},
+ {LP5024_OUT17_CLR, 0x00},
+ {LP5024_OUT18_CLR, 0x00},
+ {LP5024_OUT19_CLR, 0x00},
+ {LP5024_OUT20_CLR, 0x00},
+ {LP5024_OUT21_CLR, 0x00},
+ {LP5024_OUT22_CLR, 0x00},
+ {LP5024_OUT23_CLR, 0x00},
+ {LP5024_RESET, 0x00}
+};
+
+static const struct reg_default lp5036_reg_defs[] = {
+ {LP50XX_DEV_CFG0, 0x0},
+ {LP50XX_DEV_CFG1, 0x3c},
+ {LP50XX_LED_CFG0, 0x0},
+ {LP5036_LED_CFG1, 0x0},
+ {LP5036_BNK_BRT, 0xff},
+ {LP5036_BNKA_CLR, 0x0f},
+ {LP5036_BNKB_CLR, 0x0f},
+ {LP5036_BNKC_CLR, 0x0f},
+ {LP5036_LED0_BRT, 0x0f},
+ {LP5036_LED1_BRT, 0xff},
+ {LP5036_LED2_BRT, 0xff},
+ {LP5036_LED3_BRT, 0xff},
+ {LP5036_LED4_BRT, 0xff},
+ {LP5036_LED5_BRT, 0xff},
+ {LP5036_LED6_BRT, 0xff},
+ {LP5036_LED7_BRT, 0xff},
+ {LP5036_OUT0_CLR, 0x0f},
+ {LP5036_OUT1_CLR, 0x00},
+ {LP5036_OUT2_CLR, 0x00},
+ {LP5036_OUT3_CLR, 0x00},
+ {LP5036_OUT4_CLR, 0x00},
+ {LP5036_OUT5_CLR, 0x00},
+ {LP5036_OUT6_CLR, 0x00},
+ {LP5036_OUT7_CLR, 0x00},
+ {LP5036_OUT8_CLR, 0x00},
+ {LP5036_OUT9_CLR, 0x00},
+ {LP5036_OUT10_CLR, 0x00},
+ {LP5036_OUT11_CLR, 0x00},
+ {LP5036_OUT12_CLR, 0x00},
+ {LP5036_OUT13_CLR, 0x00},
+ {LP5036_OUT14_CLR, 0x00},
+ {LP5036_OUT15_CLR, 0x00},
+ {LP5036_OUT16_CLR, 0x00},
+ {LP5036_OUT17_CLR, 0x00},
+ {LP5036_OUT18_CLR, 0x00},
+ {LP5036_OUT19_CLR, 0x00},
+ {LP5036_OUT20_CLR, 0x00},
+ {LP5036_OUT21_CLR, 0x00},
+ {LP5036_OUT22_CLR, 0x00},
+ {LP5036_OUT23_CLR, 0x00},
+ {LP5036_OUT24_CLR, 0x00},
+ {LP5036_OUT25_CLR, 0x00},
+ {LP5036_OUT26_CLR, 0x00},
+ {LP5036_OUT27_CLR, 0x00},
+ {LP5036_OUT28_CLR, 0x00},
+ {LP5036_OUT29_CLR, 0x00},
+ {LP5036_OUT30_CLR, 0x00},
+ {LP5036_OUT31_CLR, 0x00},
+ {LP5036_OUT32_CLR, 0x00},
+ {LP5036_OUT33_CLR, 0x00},
+ {LP5036_OUT34_CLR, 0x00},
+ {LP5036_OUT35_CLR, 0x00},
+ {LP5036_RESET, 0x00}
+};
+
+static const struct regmap_config lp5012_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LP5012_RESET,
+ .reg_defaults = lp5012_reg_defs,
+ .num_reg_defaults = ARRAY_SIZE(lp5012_reg_defs),
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static const struct regmap_config lp5024_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LP5024_RESET,
+ .reg_defaults = lp5024_reg_defs,
+ .num_reg_defaults = ARRAY_SIZE(lp5024_reg_defs),
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static const struct regmap_config lp5036_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LP5036_RESET,
+ .reg_defaults = lp5036_reg_defs,
+ .num_reg_defaults = ARRAY_SIZE(lp5036_reg_defs),
+ .cache_type = REGCACHE_RBTREE,
+};
+
+enum lp50xx_model {
+ LP5009,
+ LP5012,
+ LP5018,
+ LP5024,
+ LP5030,
+ LP5036,
+};
+
+/*
+ * struct lp50xx_chip_info -
+ * @num_leds: number of LED outputs available on the device
+ * @led_brightness0_reg: first brightness register of the device
+ * @mix_out0_reg: first color mix register of the device
+ * @bank_brt_reg: bank brightness register
+ * @bank_mix_reg: color mix register
+ * @reset_reg: device reset register
+ */
+struct lp50xx_chip_info {
+ const struct regmap_config *lp50xx_regmap_config;
+ int model_id;
+ u8 max_modules;
+ u8 num_leds;
+ u8 led_brightness0_reg;
+ u8 mix_out0_reg;
+ u8 bank_brt_reg;
+ u8 bank_mix_reg;
+ u8 reset_reg;
+};
+
+static const struct lp50xx_chip_info lp50xx_chip_info_tbl[] = {
+ [LP5009] = {
+ .model_id = LP5009,
+ .max_modules = LP5009_MAX_LED_MODULES,
+ .num_leds = LP5009_MAX_LEDS,
+ .led_brightness0_reg = LP5012_LED0_BRT,
+ .mix_out0_reg = LP5012_OUT0_CLR,
+ .bank_brt_reg = LP5012_BNK_BRT,
+ .bank_mix_reg = LP5012_BNKA_CLR,
+ .reset_reg = LP5012_RESET,
+ .lp50xx_regmap_config = &lp5012_regmap_config,
+ },
+ [LP5012] = {
+ .model_id = LP5012,
+ .max_modules = LP5012_MAX_LED_MODULES,
+ .num_leds = LP5012_MAX_LEDS,
+ .led_brightness0_reg = LP5012_LED0_BRT,
+ .mix_out0_reg = LP5012_OUT0_CLR,
+ .bank_brt_reg = LP5012_BNK_BRT,
+ .bank_mix_reg = LP5012_BNKA_CLR,
+ .reset_reg = LP5012_RESET,
+ .lp50xx_regmap_config = &lp5012_regmap_config,
+ },
+ [LP5018] = {
+ .model_id = LP5018,
+ .max_modules = LP5018_MAX_LED_MODULES,
+ .num_leds = LP5018_MAX_LEDS,
+ .led_brightness0_reg = LP5024_LED0_BRT,
+ .mix_out0_reg = LP5024_OUT0_CLR,
+ .bank_brt_reg = LP5024_BNK_BRT,
+ .bank_mix_reg = LP5024_BNKA_CLR,
+ .reset_reg = LP5024_RESET,
+ .lp50xx_regmap_config = &lp5024_regmap_config,
+ },
+ [LP5024] = {
+ .model_id = LP5024,
+ .max_modules = LP5024_MAX_LED_MODULES,
+ .num_leds = LP5024_MAX_LEDS,
+ .led_brightness0_reg = LP5024_LED0_BRT,
+ .mix_out0_reg = LP5024_OUT0_CLR,
+ .bank_brt_reg = LP5024_BNK_BRT,
+ .bank_mix_reg = LP5024_BNKA_CLR,
+ .reset_reg = LP5024_RESET,
+ .lp50xx_regmap_config = &lp5024_regmap_config,
+ },
+ [LP5030] = {
+ .model_id = LP5030,
+ .max_modules = LP5030_MAX_LED_MODULES,
+ .num_leds = LP5030_MAX_LEDS,
+ .led_brightness0_reg = LP5036_LED0_BRT,
+ .mix_out0_reg = LP5036_OUT0_CLR,
+ .bank_brt_reg = LP5036_BNK_BRT,
+ .bank_mix_reg = LP5036_BNKA_CLR,
+ .reset_reg = LP5036_RESET,
+ .lp50xx_regmap_config = &lp5036_regmap_config,
+ },
+ [LP5036] = {
+ .model_id = LP5036,
+ .max_modules = LP5036_MAX_LED_MODULES,
+ .num_leds = LP5036_MAX_LEDS,
+ .led_brightness0_reg = LP5036_LED0_BRT,
+ .mix_out0_reg = LP5036_OUT0_CLR,
+ .bank_brt_reg = LP5036_BNK_BRT,
+ .bank_mix_reg = LP5036_BNKA_CLR,
+ .reset_reg = LP5036_RESET,
+ .lp50xx_regmap_config = &lp5036_regmap_config,
+ },
+};
+
+struct lp50xx_led {
+ struct led_classdev led_dev;
+ struct led_classdev_mc mc_cdev;
+ struct lp50xx *priv;
+ unsigned long bank_modules;
+ int led_intensity[LP50XX_LEDS_PER_MODULE];
+ u8 ctrl_bank_enabled;
+ int led_number;
+};
+
+/**
+ * struct lp50xx -
+ * @enable_gpio: hardware enable gpio
+ * @regulator: LED supply regulator pointer
+ * @client: pointer to the I2C client
+ * @regmap: device register map
+ * @dev: pointer to the devices device struct
+ * @lock: lock for reading/writing the device
+ * @chip_info: chip specific information (ie num_leds)
+ * @num_of_banked_leds: holds the number of banked LEDs
+ * @leds: array of LED strings
+ */
+struct lp50xx {
+ struct gpio_desc *enable_gpio;
+ struct regulator *regulator;
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct device *dev;
+ struct mutex lock;
+ const struct lp50xx_chip_info *chip_info;
+ int num_of_banked_leds;
+
+ /* This needs to be at the end of the struct */
+ struct lp50xx_led leds[];
+};
+
+static struct lp50xx_led *mcled_cdev_to_led(struct led_classdev_mc *mc_cdev)
+{
+ return container_of(mc_cdev, struct lp50xx_led, mc_cdev);
+}
+
+static int lp50xx_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev);
+ struct lp50xx_led *led = mcled_cdev_to_led(mc_dev);
+ const struct lp50xx_chip_info *led_chip = led->priv->chip_info;
+ u8 led_offset, reg_val;
+ int ret = 0;
+ int i;
+
+ mutex_lock(&led->priv->lock);
+ if (led->ctrl_bank_enabled)
+ reg_val = led_chip->bank_brt_reg;
+ else
+ reg_val = led_chip->led_brightness0_reg +
+ led->led_number;
+
+ ret = regmap_write(led->priv->regmap, reg_val, brightness);
+ if (ret) {
+ dev_err(&led->priv->client->dev,
+ "Cannot write brightness value %d\n", ret);
+ goto out;
+ }
+
+ for (i = 0; i < led->mc_cdev.num_colors; i++) {
+ if (led->ctrl_bank_enabled) {
+ reg_val = led_chip->bank_mix_reg + i;
+ } else {
+ led_offset = (led->led_number * 3) + i;
+ reg_val = led_chip->mix_out0_reg + led_offset;
+ }
+
+ ret = regmap_write(led->priv->regmap, reg_val,
+ led->mc_cdev.multicolor_info[i].color_led_intensity);
+ if (ret) {
+ dev_err(&led->priv->client->dev,
+ "Cannot write intensity value %d\n", ret);
+ goto out;
+ }
+ }
+out:
+ mutex_unlock(&led->priv->lock);
+ return ret;
+}
+
+static enum led_brightness lp50xx_brightness_get(struct led_classdev *cdev)
+{
+ struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev);
+ struct lp50xx_led *led = mcled_cdev_to_led(mc_dev);
+ const struct lp50xx_chip_info *led_chip = led->priv->chip_info;
+ unsigned int brt_val;
+ u8 reg_val;
+ int ret;
+
+ mutex_lock(&led->priv->lock);
+
+ if (led->ctrl_bank_enabled)
+ reg_val = led_chip->bank_brt_reg;
+ else
+ reg_val = led_chip->led_brightness0_reg + led->led_number;
+
+ ret = regmap_read(led->priv->regmap, reg_val, &brt_val);
+
+ mutex_unlock(&led->priv->lock);
+
+ return brt_val;
+}
+
+static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[])
+{
+ u8 led_config_lo, led_config_hi;
+ u32 bank_enable_mask = 0;
+ int ret;
+ int i;
+
+ for (i = 0; i < priv->chip_info->max_modules; i++) {
+ if (led_banks[i])
+ bank_enable_mask |= (1 << led_banks[i]);
+ }
+
+ led_config_lo = (u8)(bank_enable_mask & 0xff);
+ led_config_hi = (u8)(bank_enable_mask >> 8) & 0xff;
+
+ ret = regmap_write(priv->regmap, LP50XX_LED_CFG0, led_config_lo);
+ if (ret)
+ return ret;
+
+ if (priv->chip_info->model_id >= LP5030)
+ ret = regmap_write(priv->regmap, LP5036_LED_CFG1,
+ led_config_hi);
+
+ return ret;
+}
+
+static int lp50xx_reset(struct lp50xx *priv)
+{
+ if (priv->enable_gpio)
+ return gpiod_direction_output(priv->enable_gpio, 1);
+ else
+ return regmap_write(priv->regmap, priv->chip_info->reset_reg,
+ LP50XX_SW_RESET);
+}
+
+static int lp50xx_enable_disable(struct lp50xx *priv, u8 enable_disable)
+{
+ return regmap_write(priv->regmap, LP50XX_DEV_CFG0, enable_disable);
+}
+
+static int lp50xx_probe_dt(struct lp50xx *priv)
+{
+ u32 led_banks[LP5036_MAX_LED_MODULES] = {0};
+ struct fwnode_handle *child = NULL;
+ struct fwnode_handle *led_node = NULL;
+ struct led_init_data init_data;
+ struct led_classdev *led_cdev;
+ struct lp50xx_led *led;
+ int num_colors;
+ u32 color_id;
+ int led_number;
+ size_t i = 0;
+ int ret = -EINVAL;
+
+ priv->enable_gpio = devm_gpiod_get_optional(&priv->client->dev,
+ "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(priv->enable_gpio)) {
+ ret = PTR_ERR(priv->enable_gpio);
+ dev_err(&priv->client->dev, "Failed to get enable gpio: %d\n",
+ ret);
+ return ret;
+ }
+
+ priv->regulator = devm_regulator_get(&priv->client->dev, "vled");
+ if (IS_ERR(priv->regulator))
+ priv->regulator = NULL;
+
+ device_for_each_child_node(&priv->client->dev, child) {
+ led = &priv->leds[i];
+ if (fwnode_property_present(child, "ti,led-bank")) {
+ ret = fwnode_property_count_u32(child, "ti,led-bank");
+ priv->num_of_banked_leds = ret;
+ if (priv->num_of_banked_leds >
+ priv->chip_info->max_modules) {
+ dev_err(&priv->client->dev,
+ "led-bank property is invalid\n");
+ ret = -EINVAL;
+ fwnode_handle_put(child);
+ goto child_out;
+ }
+
+ ret = fwnode_property_read_u32_array(child,
+ "ti,led-bank",
+ led_banks,
+ ret);
+ if (ret) {
+ dev_err(&priv->client->dev,
+ "led-bank property is missing\n");
+ fwnode_handle_put(child);
+ goto child_out;
+ }
+
+ ret = lp50xx_set_banks(priv, led_banks);
+ if (ret) {
+ dev_err(&priv->client->dev,
+ "Cannot setup banked LEDs\n");
+ fwnode_handle_put(child);
+ goto child_out;
+ }
+ led->ctrl_bank_enabled = 1;
+
+ } else {
+ ret = fwnode_property_read_u32(child, "reg",
+ &led_number);
+ if (ret) {
+ dev_err(&priv->client->dev,
+ "led reg property missing\n");
+ fwnode_handle_put(child);
+ goto child_out;
+ }
+
+ if (led_number > priv->chip_info->num_leds) {
+ dev_err(&priv->client->dev,
+ "led-sources property is invalid\n");
+ ret = -EINVAL;
+ fwnode_handle_put(child);
+ goto child_out;
+ }
+
+ led->led_number = led_number;
+ }
+
+ init_data.fwnode = child;
+ init_data.devicename = priv->client->name;
+ fwnode_property_read_string(child, "linux,default-trigger",
+ &led->led_dev.default_trigger);
+ num_colors = 0;
+
+ fwnode_for_each_child_node(child, led_node) {
+ ret = fwnode_property_read_u32(led_node, "color",
+ &color_id);
+ if (ret)
+ dev_err(&priv->client->dev,
+ "Cannot read color\n");
+
+ led->mc_cdev.multicolor_info[num_colors].color_index = color_id;
+ num_colors++;
+ }
+
+ led->priv = priv;
+ led->mc_cdev.num_colors = num_colors;
+ led_cdev = &led->mc_cdev.led_cdev;
+ led_cdev->brightness_set_blocking = lp50xx_brightness_set;
+ led_cdev->brightness_get = lp50xx_brightness_get;
+ ret = devm_led_classdev_multicolor_register_ext(&priv->client->dev,
+ &led->mc_cdev,
+ &init_data);
+ if (ret) {
+ dev_err(&priv->client->dev, "led register err: %d\n",
+ ret);
+ fwnode_handle_put(child);
+ goto child_out;
+ }
+ i++;
+ }
+
+child_out:
+ return ret;
+}
+
+static int lp50xx_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lp50xx *led;
+ int count;
+ int ret;
+
+ count = device_get_child_node_count(&client->dev);
+ if (!count) {
+ dev_err(&client->dev, "LEDs are not defined in device tree!");
+ return -ENODEV;
+ }
+
+ led = devm_kzalloc(&client->dev, struct_size(led, leds, count),
+ GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ mutex_init(&led->lock);
+ led->client = client;
+ led->dev = &client->dev;
+ led->chip_info = &lp50xx_chip_info_tbl[id->driver_data];
+ i2c_set_clientdata(client, led);
+
+ led->regmap = devm_regmap_init_i2c(client,
+ led->chip_info->lp50xx_regmap_config);
+ if (IS_ERR(led->regmap)) {
+ ret = PTR_ERR(led->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = lp50xx_reset(led);
+ if (ret)
+ return ret;
+
+ ret = lp50xx_probe_dt(led);
+ if (ret)
+ return ret;
+
+ return lp50xx_enable_disable(led, LP50XX_CHIP_EN);
+}
+
+static int lp50xx_remove(struct i2c_client *client)
+{
+ struct lp50xx *led = i2c_get_clientdata(client);
+ int ret;
+
+ ret = lp50xx_enable_disable(led, LP50XX_CHIP_EN);
+ if (ret) {
+ dev_err(&led->client->dev, "Failed to disable regulator\n");
+ return ret;
+ }
+
+ if (led->enable_gpio)
+ gpiod_direction_output(led->enable_gpio, 0);
+
+ if (led->regulator) {
+ ret = regulator_disable(led->regulator);
+ if (ret)
+ dev_err(&led->client->dev,
+ "Failed to disable regulator\n");
+ }
+
+ mutex_destroy(&led->lock);
+
+ return 0;
+}
+
+static const struct i2c_device_id lp50xx_id[] = {
+ { "lp5009", LP5009 },
+ { "lp5012", LP5012 },
+ { "lp5018", LP5018 },
+ { "lp5024", LP5024 },
+ { "lp5030", LP5030 },
+ { "lp5036", LP5036 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lp50xx_id);
+
+static const struct of_device_id of_lp50xx_leds_match[] = {
+ { .compatible = "ti,lp5009", .data = (void *)LP5009 },
+ { .compatible = "ti,lp5012", .data = (void *)LP5012 },
+ { .compatible = "ti,lp5018", .data = (void *)LP5018 },
+ { .compatible = "ti,lp5024", .data = (void *)LP5024 },
+ { .compatible = "ti,lp5030", .data = (void *)LP5030 },
+ { .compatible = "ti,lp5036", .data = (void *)LP5036 },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_lp50xx_leds_match);
+
+static struct i2c_driver lp50xx_driver = {
+ .driver = {
+ .name = "lp50xx",
+ .of_match_table = of_lp50xx_leds_match,
+ },
+ .probe = lp50xx_probe,
+ .remove = lp50xx_remove,
+ .id_table = lp50xx_id,
+};
+module_i2c_driver(lp50xx_driver);
+
+MODULE_DESCRIPTION("Texas Instruments LP50XX LED driver");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_LICENSE("GPL v2");
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 07/18] dt: bindings: lp55xx: Be consistent in the document with LED acronym
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (5 preceding siblings ...)
2020-04-02 20:42 ` [PATCH v19 06/18] leds: lp50xx: Add the LP50XX family of the RGB LED driver Dan Murphy
@ 2020-04-02 20:43 ` Dan Murphy
2020-04-02 20:43 ` [PATCH v19 08/18] dt: bindings: lp55xx: Update binding for Multicolor Framework Dan Murphy
` (10 subsequent siblings)
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:43 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Update the document to be consistent in case when using "LED".
This acronym should be capital throughout the document.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
---
Documentation/devicetree/bindings/leds/leds-lp55xx.txt | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/leds/leds-lp55xx.txt b/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
index 1b66a413fb9d..bfe2805c5534 100644
--- a/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
+++ b/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
@@ -1,4 +1,4 @@
-Binding for TI/National Semiconductor LP55xx Led Drivers
+Binding for TI/National Semiconductor LP55xx LED Drivers
Required properties:
- compatible: one of
@@ -12,8 +12,8 @@ Required properties:
- clock-mode: Input clock mode, (0: automode, 1: internal, 2: external)
Each child has own specific current settings
-- led-cur: Current setting at each led channel (mA x10, 0 if led is not connected)
-- max-cur: Maximun current at each led channel.
+- led-cur: Current setting at each LED channel (mA x10, 0 if LED is not connected)
+- max-cur: Maximun current at each LED channel.
Optional properties:
- enable-gpio: GPIO attached to the chip's enable pin
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 08/18] dt: bindings: lp55xx: Update binding for Multicolor Framework
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (6 preceding siblings ...)
2020-04-02 20:43 ` [PATCH v19 07/18] dt: bindings: lp55xx: Be consistent in the document with LED acronym Dan Murphy
@ 2020-04-02 20:43 ` Dan Murphy
2020-04-02 20:43 ` [PATCH v19 09/18] ARM: dts: n900: Add reg property to the LP5523 channel node Dan Murphy
` (9 subsequent siblings)
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:43 UTC (permalink / raw)
To: jacek.anaszewski, pavel
Cc: linux-leds, linux-kernel, Dan Murphy, Linus Walleij,
Tony Lindgren, Benoît Cousson, Shawn Guo, Sascha Hauer,
Pengutronix Kernel Team, Fabio Estevam, NXP Linux Team
Update the DT binding to include the properties to use the
multicolor framework for the devices that use the LP55xx
framework.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dan Murphy <dmurphy@ti.com>
CC: Tony Lindgren <tony@atomide.com>
CC: "Benoît Cousson" <bcousson@baylibre.com>
CC: Linus Walleij <linus.walleij@linaro.org>
CC: Shawn Guo <shawnguo@kernel.org>
CC: Sascha Hauer <s.hauer@pengutronix.de>
CC: Pengutronix Kernel Team <kernel@pengutronix.de>
CC: Fabio Estevam <festevam@gmail.com>
CC: NXP Linux Team <linux-imx@nxp.com>
---
.../devicetree/bindings/leds/leds-lp55xx.txt | 149 +++++++++++++++---
1 file changed, 124 insertions(+), 25 deletions(-)
diff --git a/Documentation/devicetree/bindings/leds/leds-lp55xx.txt b/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
index bfe2805c5534..0ccc1efc2499 100644
--- a/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
+++ b/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
@@ -1,6 +1,8 @@
Binding for TI/National Semiconductor LP55xx LED Drivers
Required properties:
+- #address-cells: 1
+- #size-cells: 0
- compatible: one of
national,lp5521
national,lp5523
@@ -14,6 +16,18 @@ Required properties:
Each child has own specific current settings
- led-cur: Current setting at each LED channel (mA x10, 0 if LED is not connected)
- max-cur: Maximun current at each LED channel.
+- reg: Output channel for the LED. This is zero based channel identifier and
+ the data sheet is a one based channel identifier.
+ reg value to output to LED output number
+ D1 = reg value is 0
+ D2 = reg value is 1
+ D3 = reg value is 2
+ D4 = reg value is 3
+ D5 = reg value is 4
+ D6 = reg value is 5
+ D7 = reg value is 6
+ D8 = reg value is 7
+ D9 = reg value is 8
Optional properties:
- enable-gpio: GPIO attached to the chip's enable pin
@@ -35,23 +49,28 @@ example 1) LP5521
on channel 0.
lp5521@32 {
+ #address-cells = <1>;
+ #size-cells = <0>;
compatible = "national,lp5521";
reg = <0x32>;
label = "lp5521_pri";
clock-mode = /bits/ 8 <2>;
- chan0 {
+ chan@0 {
+ reg = <0>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
linux,default-trigger = "heartbeat";
};
- chan1 {
+ chan@1 {
+ reg = <1>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
};
- chan2 {
+ chan@2 {
+ reg = <2>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
};
@@ -70,59 +89,70 @@ ASEL1 ASEL0 Address
VEN VEN 35h
lp5523@32 {
+ #address-cells = <1>;
+ #size-cells = <0>;
compatible = "national,lp5523";
reg = <0x32>;
clock-mode = /bits/ 8 <1>;
- chan0 {
+ chan@0 {
+ reg = <0>;
chan-name = "d1";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan1 {
+ chan@1 {
+ reg = <1>;
chan-name = "d2";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan2 {
+ chan@2 {
+ reg = <2>;
chan-name = "d3";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan3 {
+ chan@3 {
+ reg = <3>;
chan-name = "d4";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan4 {
+ chan@4 {
+ reg = <4>;
chan-name = "d5";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan5 {
+ chan@5 {
+ reg = <5>;
chan-name = "d6";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan6 {
+ chan@6 {
+ reg = <6>;
chan-name = "d7";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan7 {
+ chan@7 {
+ reg = <7>;
chan-name = "d8";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan8 {
+ chan@8 {
+ reg = <8>;
chan-name = "d9";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
@@ -133,29 +163,35 @@ example 3) LP5562
4 channels are defined.
lp5562@30 {
+ #address-cells = <1>;
+ #size-cells = <0>;
compatible = "ti,lp5562";
reg = <0x30>;
clock-mode = /bits/8 <2>;
- chan0 {
+ chan@0 {
+ reg = <0>;
chan-name = "R";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
};
- chan1 {
+ chan@1 {
+ reg = <1>;
chan-name = "G";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
};
- chan2 {
+ chan@2 {
+ reg = <2>;
chan-name = "B";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
};
- chan3 {
+ chan@3 {
+ reg = <3>;
chan-name = "W";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
@@ -167,62 +203,125 @@ example 4) LP8501
Others are same as LP5523.
lp8501@32 {
+ #address-cells = <1>;
+ #size-cells = <0>;
compatible = "ti,lp8501";
reg = <0x32>;
clock-mode = /bits/ 8 <2>;
pwr-sel = /bits/ 8 <3>; /* D1~9 connected to VOUT */
- chan0 {
+ chan@0 {
+ reg = <0>;
chan-name = "d1";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan1 {
+ chan@1 {
+ reg = <1>;
chan-name = "d2";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan2 {
+ chan@2 {
+ reg = <2>;
chan-name = "d3";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan3 {
+ chan@3 {
+ reg = <3>;
chan-name = "d4";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan4 {
+ chan@4 {
+ reg = <4>;
chan-name = "d5";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan5 {
+ chan@5 {
+ reg = <5>;
chan-name = "d6";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan6 {
+ chan@6 {
+ reg = <6>;
chan-name = "d7";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan7 {
+ chan@7 {
+ reg = <7>;
chan-name = "d8";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan8 {
+ chan@8 {
+ reg = <8>;
chan-name = "d9";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
};
+
+Multicolor Framework Support
+In addition to the nodes and properties defined above for device support the
+properties below are needed for multicolor framework support as defined in
+Documentation/devicetree/bindings/leds/leds-class-multicolor.txt
+
+Required child properties for multicolor framework
+ - color : Must be LED_COLOR_ID_MULTI
+ - function : see Documentation/devicetree/bindings/leds/common.txt
+
+Required grandchildren properties
+ - reg : This is the LED output of the device
+ - color : see Documentation/devicetree/bindings/leds/common.txt
+
+Multicolor LED example:
+led-controller@32 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "national,lp5523";
+ reg = <0x32>;
+ clock-mode = /bits/ 8 <0>; /* LP55XX_CLOCK_AUTO */
+
+ multi-led@2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <2>;
+ color = <LED_COLOR_ID_MULTI>;
+ function = LED_FUNCTION_STANDBY;
+ linux,default-trigger = "heartbeat";
+
+ led@0 {
+ led-cur = /bits/ 8 <50>;
+ max-cur = /bits/ 8 <100>;
+ reg = <0x0>;
+ color = <LED_COLOR_ID_GREEN>;
+ };
+
+ led@1 {
+ led-cur = /bits/ 8 <50>;
+ max-cur = /bits/ 8 <100>;
+ reg = <0x1>;
+ color = <LED_COLOR_ID_BLUE>;
+ };
+
+ led@6 {
+ led-cur = /bits/ 8 <50>;
+ max-cur = /bits/ 8 <100>;
+ reg = <0x6>;
+ color = <LED_COLOR_ID_RED>;
+ };
+ };
+};
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 09/18] ARM: dts: n900: Add reg property to the LP5523 channel node
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (7 preceding siblings ...)
2020-04-02 20:43 ` [PATCH v19 08/18] dt: bindings: lp55xx: Update binding for Multicolor Framework Dan Murphy
@ 2020-04-02 20:43 ` Dan Murphy
2020-04-02 20:43 ` [PATCH v19 10/18] ARM: dts: imx6dl-yapp4: Add reg property to the lp5562 " Dan Murphy
` (8 subsequent siblings)
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:43 UTC (permalink / raw)
To: jacek.anaszewski, pavel
Cc: linux-leds, linux-kernel, Dan Murphy, Tony Lindgren, Benoît Cousson
Add the reg property to each channel node. This update is
to accomodate the multicolor framework. In addition to the
accomodation this allows the LEDs to be placed on any channel
and allow designs to skip channels as opposed to requiring
sequential order.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
CC: Tony Lindgren <tony@atomide.com>
CC: "Benoît Cousson" <bcousson@baylibre.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
---
arch/arm/boot/dts/omap3-n900.dts | 29 ++++++++++++++++++++---------
1 file changed, 20 insertions(+), 9 deletions(-)
diff --git a/arch/arm/boot/dts/omap3-n900.dts b/arch/arm/boot/dts/omap3-n900.dts
index 4089d97405c9..ebe93b06b4f7 100644
--- a/arch/arm/boot/dts/omap3-n900.dts
+++ b/arch/arm/boot/dts/omap3-n900.dts
@@ -618,63 +618,74 @@ indicator {
};
lp5523: lp5523@32 {
+ #address-cells = <1>;
+ #size-cells = <0>;
compatible = "national,lp5523";
reg = <0x32>;
clock-mode = /bits/ 8 <0>; /* LP55XX_CLOCK_AUTO */
enable-gpio = <&gpio2 9 GPIO_ACTIVE_HIGH>; /* 41 */
- chan0 {
+ chan@0 {
chan-name = "lp5523:kb1";
led-cur = /bits/ 8 <50>;
max-cur = /bits/ 8 <100>;
+ reg = <0>;
};
- chan1 {
+ chan@1 {
chan-name = "lp5523:kb2";
led-cur = /bits/ 8 <50>;
max-cur = /bits/ 8 <100>;
+ reg = <1>;
};
- chan2 {
+ chan@2 {
chan-name = "lp5523:kb3";
led-cur = /bits/ 8 <50>;
max-cur = /bits/ 8 <100>;
+ reg = <2>;
};
- chan3 {
+ chan@3 {
chan-name = "lp5523:kb4";
led-cur = /bits/ 8 <50>;
max-cur = /bits/ 8 <100>;
+ reg = <3>;
};
- chan4 {
+ chan@4 {
chan-name = "lp5523:b";
led-cur = /bits/ 8 <50>;
max-cur = /bits/ 8 <100>;
+ reg = <4>;
};
- chan5 {
+ chan@5 {
chan-name = "lp5523:g";
led-cur = /bits/ 8 <50>;
max-cur = /bits/ 8 <100>;
+ reg = <5>;
};
- chan6 {
+ chan@6 {
chan-name = "lp5523:r";
led-cur = /bits/ 8 <50>;
max-cur = /bits/ 8 <100>;
+ reg = <6>;
};
- chan7 {
+ chan@7 {
chan-name = "lp5523:kb5";
led-cur = /bits/ 8 <50>;
max-cur = /bits/ 8 <100>;
+ reg = <7>;
};
- chan8 {
+ chan@8 {
chan-name = "lp5523:kb6";
led-cur = /bits/ 8 <50>;
max-cur = /bits/ 8 <100>;
+ reg = <8>;
};
};
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 10/18] ARM: dts: imx6dl-yapp4: Add reg property to the lp5562 channel node
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (8 preceding siblings ...)
2020-04-02 20:43 ` [PATCH v19 09/18] ARM: dts: n900: Add reg property to the LP5523 channel node Dan Murphy
@ 2020-04-02 20:43 ` Dan Murphy
2020-04-02 20:43 ` [PATCH v19 11/18] ARM: dts: ste-href: Add reg property to the LP5521 channel nodes Dan Murphy
` (7 subsequent siblings)
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:43 UTC (permalink / raw)
To: jacek.anaszewski, pavel
Cc: linux-leds, linux-kernel, Dan Murphy, Shawn Guo, Sascha Hauer,
Pengutronix Kernel Team, Fabio Estevam, NXP Linux Team
Add the reg property to each channel node. This update is
to accomodate the multicolor framework. In addition to the
accomodation this allows the LEDs to be placed on any channel
and allow designs to skip channels as opposed to requiring
sequential order.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
CC: Shawn Guo <shawnguo@kernel.org>
CC: Sascha Hauer <s.hauer@pengutronix.de>
CC: Pengutronix Kernel Team <kernel@pengutronix.de>
CC: Fabio Estevam <festevam@gmail.com>
CC: NXP Linux Team <linux-imx@nxp.com>
---
arch/arm/boot/dts/imx6dl-yapp4-common.dtsi | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi b/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
index 80ed5f16a76e..fe1a723b4dc9 100644
--- a/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
+++ b/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
@@ -258,29 +258,35 @@ leds: led-controller@30 {
reg = <0x30>;
clock-mode = /bits/ 8 <1>;
status = "disabled";
+ #address-cells = <1>;
+ #size-cells = <0>;
- chan0 {
+ chan@0 {
chan-name = "R";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
+ reg = <0>;
};
- chan1 {
+ chan@1 {
chan-name = "G";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
+ reg = <1>;
};
- chan2 {
+ chan@2 {
chan-name = "B";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
+ reg = <2>;
};
- chan3 {
+ chan@3 {
chan-name = "W";
led-cur = /bits/ 8 <0x0>;
max-cur = /bits/ 8 <0x0>;
+ reg = <3>;
};
};
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 11/18] ARM: dts: ste-href: Add reg property to the LP5521 channel nodes
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (9 preceding siblings ...)
2020-04-02 20:43 ` [PATCH v19 10/18] ARM: dts: imx6dl-yapp4: Add reg property to the lp5562 " Dan Murphy
@ 2020-04-02 20:43 ` Dan Murphy
2020-04-02 20:43 ` [PATCH v19 12/18] leds: lp55xx: Convert LED class registration to devm_* Dan Murphy
` (6 subsequent siblings)
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:43 UTC (permalink / raw)
To: jacek.anaszewski, pavel
Cc: linux-leds, linux-kernel, Dan Murphy, Linus Walleij
Add the reg property to each channel node. This update is
to accomodate the multicolor framework. In addition to the
accomodation this allows the LEDs to be placed on any channel
and allow designs to skip channels as opposed to requiring
sequential order.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
CC: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
---
arch/arm/boot/dts/ste-href.dtsi | 22 ++++++++++++++++------
1 file changed, 16 insertions(+), 6 deletions(-)
diff --git a/arch/arm/boot/dts/ste-href.dtsi b/arch/arm/boot/dts/ste-href.dtsi
index 33e3b0b3c53d..ff47cbf6ed3b 100644
--- a/arch/arm/boot/dts/ste-href.dtsi
+++ b/arch/arm/boot/dts/ste-href.dtsi
@@ -58,16 +58,21 @@ lp5521@33 {
reg = <0x33>;
label = "lp5521_pri";
clock-mode = /bits/ 8 <2>;
- chan0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ chan@0 {
+ reg = <0>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
linux,default-trigger = "heartbeat";
};
- chan1 {
+ chan@1 {
+ reg = <1>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
};
- chan2 {
+ chan@2 {
+ reg = <2>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
};
@@ -77,15 +82,20 @@ lp5521@34 {
reg = <0x34>;
label = "lp5521_sec";
clock-mode = /bits/ 8 <2>;
- chan0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ chan@0 {
+ reg = <0>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
};
- chan1 {
+ chan@1 {
+ reg = <1>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
};
- chan2 {
+ chan@2 {
+ reg = <2>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
};
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 12/18] leds: lp55xx: Convert LED class registration to devm_*
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (10 preceding siblings ...)
2020-04-02 20:43 ` [PATCH v19 11/18] ARM: dts: ste-href: Add reg property to the LP5521 channel nodes Dan Murphy
@ 2020-04-02 20:43 ` Dan Murphy
2020-04-02 20:43 ` [PATCH v19 13/18] leds: lp55xx: Add multicolor framework support to lp55xx Dan Murphy
` (5 subsequent siblings)
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:43 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Convert the LED class registration calls to the LED devm_*
registration calls.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
---
drivers/leds/leds-lp5521.c | 9 +++------
drivers/leds/leds-lp5523.c | 9 +++------
drivers/leds/leds-lp5562.c | 9 +++------
drivers/leds/leds-lp55xx-common.c | 15 +--------------
drivers/leds/leds-lp55xx-common.h | 2 --
drivers/leds/leds-lp8501.c | 9 +++------
6 files changed, 13 insertions(+), 40 deletions(-)
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index 6f0272249dc8..6d2163c0f625 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -541,19 +541,17 @@ static int lp5521_probe(struct i2c_client *client,
ret = lp55xx_register_leds(led, chip);
if (ret)
- goto err_register_leds;
+ goto err_out;
ret = lp55xx_register_sysfs(chip);
if (ret) {
dev_err(&client->dev, "registering sysfs failed\n");
- goto err_register_sysfs;
+ goto err_out;
}
return 0;
-err_register_sysfs:
- lp55xx_unregister_leds(led, chip);
-err_register_leds:
+err_out:
lp55xx_deinit_device(chip);
err_init:
return ret;
@@ -566,7 +564,6 @@ static int lp5521_remove(struct i2c_client *client)
lp5521_stop_all_engines(chip);
lp55xx_unregister_sysfs(chip);
- lp55xx_unregister_leds(led, chip);
lp55xx_deinit_device(chip);
return 0;
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index d0b931a136b9..15e7051392f5 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -908,19 +908,17 @@ static int lp5523_probe(struct i2c_client *client,
ret = lp55xx_register_leds(led, chip);
if (ret)
- goto err_register_leds;
+ goto err_out;
ret = lp55xx_register_sysfs(chip);
if (ret) {
dev_err(&client->dev, "registering sysfs failed\n");
- goto err_register_sysfs;
+ goto err_out;
}
return 0;
-err_register_sysfs:
- lp55xx_unregister_leds(led, chip);
-err_register_leds:
+err_out:
lp55xx_deinit_device(chip);
err_init:
return ret;
@@ -933,7 +931,6 @@ static int lp5523_remove(struct i2c_client *client)
lp5523_stop_all_engines(chip);
lp55xx_unregister_sysfs(chip);
- lp55xx_unregister_leds(led, chip);
lp55xx_deinit_device(chip);
return 0;
diff --git a/drivers/leds/leds-lp5562.c b/drivers/leds/leds-lp5562.c
index edb57c42e8b1..1c94422408b0 100644
--- a/drivers/leds/leds-lp5562.c
+++ b/drivers/leds/leds-lp5562.c
@@ -554,19 +554,17 @@ static int lp5562_probe(struct i2c_client *client,
ret = lp55xx_register_leds(led, chip);
if (ret)
- goto err_register_leds;
+ goto err_out;
ret = lp55xx_register_sysfs(chip);
if (ret) {
dev_err(&client->dev, "registering sysfs failed\n");
- goto err_register_sysfs;
+ goto err_out;
}
return 0;
-err_register_sysfs:
- lp55xx_unregister_leds(led, chip);
-err_register_leds:
+err_out:
lp55xx_deinit_device(chip);
err_init:
return ret;
@@ -580,7 +578,6 @@ static int lp5562_remove(struct i2c_client *client)
lp5562_stop_engine(chip);
lp55xx_unregister_sysfs(chip);
- lp55xx_unregister_leds(led, chip);
lp55xx_deinit_device(chip);
return 0;
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
index 44ced02b49f9..882ef39e4965 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -181,7 +181,7 @@ static int lp55xx_init_led(struct lp55xx_led *led,
led->cdev.name = name;
}
- ret = led_classdev_register(dev, &led->cdev);
+ ret = devm_led_classdev_register(dev, &led->cdev);
if (ret) {
dev_err(dev, "led register err: %d\n", ret);
return ret;
@@ -490,23 +490,10 @@ int lp55xx_register_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
return 0;
err_init_led:
- lp55xx_unregister_leds(led, chip);
return ret;
}
EXPORT_SYMBOL_GPL(lp55xx_register_leds);
-void lp55xx_unregister_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
-{
- int i;
- struct lp55xx_led *each;
-
- for (i = 0; i < chip->num_leds; i++) {
- each = led + i;
- led_classdev_unregister(&each->cdev);
- }
-}
-EXPORT_SYMBOL_GPL(lp55xx_unregister_leds);
-
int lp55xx_register_sysfs(struct lp55xx_chip *chip)
{
struct device *dev = &chip->cl->dev;
diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h
index 783ed5103ce5..b9b1041e8143 100644
--- a/drivers/leds/leds-lp55xx-common.h
+++ b/drivers/leds/leds-lp55xx-common.h
@@ -189,8 +189,6 @@ extern void lp55xx_deinit_device(struct lp55xx_chip *chip);
/* common LED class device functions */
extern int lp55xx_register_leds(struct lp55xx_led *led,
struct lp55xx_chip *chip);
-extern void lp55xx_unregister_leds(struct lp55xx_led *led,
- struct lp55xx_chip *chip);
/* common device attributes functions */
extern int lp55xx_register_sysfs(struct lp55xx_chip *chip);
diff --git a/drivers/leds/leds-lp8501.c b/drivers/leds/leds-lp8501.c
index 2638dbf0e8ac..a58019cdb8c3 100644
--- a/drivers/leds/leds-lp8501.c
+++ b/drivers/leds/leds-lp8501.c
@@ -344,19 +344,17 @@ static int lp8501_probe(struct i2c_client *client,
ret = lp55xx_register_leds(led, chip);
if (ret)
- goto err_register_leds;
+ goto err_out;
ret = lp55xx_register_sysfs(chip);
if (ret) {
dev_err(&client->dev, "registering sysfs failed\n");
- goto err_register_sysfs;
+ goto err_out;
}
return 0;
-err_register_sysfs:
- lp55xx_unregister_leds(led, chip);
-err_register_leds:
+err_out:
lp55xx_deinit_device(chip);
err_init:
return ret;
@@ -369,7 +367,6 @@ static int lp8501_remove(struct i2c_client *client)
lp8501_stop_engine(chip);
lp55xx_unregister_sysfs(chip);
- lp55xx_unregister_leds(led, chip);
lp55xx_deinit_device(chip);
return 0;
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 13/18] leds: lp55xx: Add multicolor framework support to lp55xx
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (11 preceding siblings ...)
2020-04-02 20:43 ` [PATCH v19 12/18] leds: lp55xx: Convert LED class registration to devm_* Dan Murphy
@ 2020-04-02 20:43 ` Dan Murphy
2020-04-02 20:43 ` [PATCH v19 14/18] leds: lp5523: Update the lp5523 code to add multicolor brightness function Dan Murphy
` (4 subsequent siblings)
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:43 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Add multicolor framework support for the lp55xx family.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
drivers/leds/Kconfig | 1 +
drivers/leds/leds-lp5521.c | 14 +-
drivers/leds/leds-lp5523.c | 14 +-
drivers/leds/leds-lp5562.c | 13 +-
drivers/leds/leds-lp55xx-common.c | 169 +++++++++++++++++++---
drivers/leds/leds-lp55xx-common.h | 11 +-
drivers/leds/leds-lp8501.c | 14 +-
include/linux/platform_data/leds-lp55xx.h | 8 +
8 files changed, 198 insertions(+), 46 deletions(-)
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index fa2780ac03b2..f70405cd6e29 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -377,6 +377,7 @@ config LEDS_LP50XX
config LEDS_LP55XX_COMMON
tristate "Common Driver for TI/National LP5521/5523/55231/5562/8501"
depends on LEDS_LP5521 || LEDS_LP5523 || LEDS_LP5562 || LEDS_LP8501
+ depends on OF
select FW_LOADER
select FW_LOADER_USER_HELPER
help
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index 6d2163c0f625..6ff81d6be789 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -505,9 +505,16 @@ static int lp5521_probe(struct i2c_client *client,
struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
struct device_node *np = client->dev.of_node;
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->cfg = &lp5521_cfg;
+
if (!pdata) {
if (np) {
- pdata = lp55xx_of_populate_pdata(&client->dev, np);
+ pdata = lp55xx_of_populate_pdata(&client->dev, np,
+ chip);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
} else {
@@ -516,10 +523,6 @@ static int lp5521_probe(struct i2c_client *client,
}
}
- chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
-
led = devm_kcalloc(&client->dev,
pdata->num_channels, sizeof(*led), GFP_KERNEL);
if (!led)
@@ -527,7 +530,6 @@ static int lp5521_probe(struct i2c_client *client,
chip->cl = client;
chip->pdata = pdata;
- chip->cfg = &lp5521_cfg;
mutex_init(&chip->lock);
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index 15e7051392f5..b076c16df9ab 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -872,9 +872,16 @@ static int lp5523_probe(struct i2c_client *client,
struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
struct device_node *np = client->dev.of_node;
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->cfg = &lp5523_cfg;
+
if (!pdata) {
if (np) {
- pdata = lp55xx_of_populate_pdata(&client->dev, np);
+ pdata = lp55xx_of_populate_pdata(&client->dev, np,
+ chip);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
} else {
@@ -883,10 +890,6 @@ static int lp5523_probe(struct i2c_client *client,
}
}
- chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
-
led = devm_kcalloc(&client->dev,
pdata->num_channels, sizeof(*led), GFP_KERNEL);
if (!led)
@@ -894,7 +897,6 @@ static int lp5523_probe(struct i2c_client *client,
chip->cl = client;
chip->pdata = pdata;
- chip->cfg = &lp5523_cfg;
mutex_init(&chip->lock);
diff --git a/drivers/leds/leds-lp5562.c b/drivers/leds/leds-lp5562.c
index 1c94422408b0..7ecdd199d7ef 100644
--- a/drivers/leds/leds-lp5562.c
+++ b/drivers/leds/leds-lp5562.c
@@ -520,9 +520,16 @@ static int lp5562_probe(struct i2c_client *client,
struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
struct device_node *np = client->dev.of_node;
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->cfg = &lp5562_cfg;
+
if (!pdata) {
if (np) {
- pdata = lp55xx_of_populate_pdata(&client->dev, np);
+ pdata = lp55xx_of_populate_pdata(&client->dev, np,
+ chip);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
} else {
@@ -531,9 +538,6 @@ static int lp5562_probe(struct i2c_client *client,
}
}
- chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
led = devm_kcalloc(&client->dev,
pdata->num_channels, sizeof(*led), GFP_KERNEL);
@@ -542,7 +546,6 @@ static int lp5562_probe(struct i2c_client *client,
chip->cl = client;
chip->pdata = pdata;
- chip->cfg = &lp5562_cfg;
mutex_init(&chip->lock);
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
index 882ef39e4965..74f90b670811 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -35,6 +35,11 @@ static struct lp55xx_led *dev_to_lp55xx_led(struct device *dev)
return cdev_to_lp55xx_led(dev_get_drvdata(dev));
}
+static struct lp55xx_led *mcled_cdev_to_led(struct led_classdev_mc *mc_cdev)
+{
+ return container_of(mc_cdev, struct lp55xx_led, mc_cdev);
+}
+
static void lp55xx_reset_device(struct lp55xx_chip *chip)
{
struct lp55xx_device_config *cfg = chip->cfg;
@@ -131,6 +136,18 @@ static struct attribute *lp55xx_led_attrs[] = {
};
ATTRIBUTE_GROUPS(lp55xx_led);
+static int lp55xx_set_mc_brightness(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev);
+ struct lp55xx_led *led = mcled_cdev_to_led(mc_dev);
+ struct lp55xx_device_config *cfg = led->chip->cfg;
+
+ led_mc_calc_color_components(&led->mc_cdev, brightness);
+ return cfg->multicolor_brightness_fn(led);
+
+}
+
static int lp55xx_set_brightness(struct led_classdev *cdev,
enum led_brightness brightness)
{
@@ -147,9 +164,11 @@ static int lp55xx_init_led(struct lp55xx_led *led,
struct lp55xx_platform_data *pdata = chip->pdata;
struct lp55xx_device_config *cfg = chip->cfg;
struct device *dev = &chip->cl->dev;
+ int max_channel = cfg->max_channel;
+ struct led_classdev *led_cdev;
char name[32];
+ int i, j = 0;
int ret;
- int max_channel = cfg->max_channel;
if (chan >= max_channel) {
dev_err(dev, "invalid channel: %d / %d\n", chan, max_channel);
@@ -159,10 +178,36 @@ static int lp55xx_init_led(struct lp55xx_led *led,
if (pdata->led_config[chan].led_current == 0)
return 0;
+ if (pdata->led_config[chan].name) {
+ led->cdev.name = pdata->led_config[chan].name;
+ } else {
+ snprintf(name, sizeof(name), "%s:channel%d",
+ pdata->label ? : chip->cl->name, chan);
+ led->cdev.name = name;
+ }
+
+ if (pdata->led_config[chan].num_colors > 1) {
+ led_cdev = &led->mc_cdev.led_cdev;
+ led_cdev->name = led->cdev.name;
+ led_cdev->brightness_set_blocking = lp55xx_set_mc_brightness;
+ led_cdev->groups = lp55xx_led_groups;
+ led->mc_cdev.num_colors = pdata->led_config[chan].num_colors;
+ for (i = 0; i < led->mc_cdev.num_colors; i++) {
+ led->mc_cdev.multicolor_info[i].color_index =
+ pdata->led_config[chan].color_id[i];
+ led->mc_cdev.multicolor_info[i].color_channel =
+ pdata->led_config[chan].output_num[i];
+ j++;
+ }
+ } else {
+ led->cdev.default_trigger =
+ pdata->led_config[chan].default_trigger;
+ led->cdev.brightness_set_blocking = lp55xx_set_brightness;
+ } led->cdev.groups = lp55xx_led_groups;
+
led->led_current = pdata->led_config[chan].led_current;
led->max_current = pdata->led_config[chan].max_current;
led->chan_nr = pdata->led_config[chan].chan_nr;
- led->cdev.default_trigger = pdata->led_config[chan].default_trigger;
if (led->chan_nr >= max_channel) {
dev_err(dev, "Use channel numbers between 0 and %d\n",
@@ -170,18 +215,11 @@ static int lp55xx_init_led(struct lp55xx_led *led,
return -EINVAL;
}
- led->cdev.brightness_set_blocking = lp55xx_set_brightness;
- led->cdev.groups = lp55xx_led_groups;
+ if (pdata->led_config[chan].num_colors > 1)
+ ret = devm_led_classdev_multicolor_register(dev, &led->mc_cdev);
+ else
+ ret = devm_led_classdev_register(dev, &led->cdev);
- if (pdata->led_config[chan].name) {
- led->cdev.name = pdata->led_config[chan].name;
- } else {
- snprintf(name, sizeof(name), "%s:channel%d",
- pdata->label ? : chip->cl->name, chan);
- led->cdev.name = name;
- }
-
- ret = devm_led_classdev_register(dev, &led->cdev);
if (ret) {
dev_err(dev, "led register err: %d\n", ret);
return ret;
@@ -525,14 +563,105 @@ void lp55xx_unregister_sysfs(struct lp55xx_chip *chip)
}
EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs);
+static int lp55xx_parse_common_child(struct device_node *np,
+ struct lp55xx_led_config *cfg,
+ int led_number, int *chan_nr)
+{
+ int ret;
+
+ of_property_read_string(np, "chan-name",
+ &cfg[led_number].name);
+ of_property_read_u8(np, "led-cur",
+ &cfg[led_number].led_current);
+ of_property_read_u8(np, "max-cur",
+ &cfg[led_number].max_current);
+
+ ret = of_property_read_u32(np, "reg", chan_nr);
+ if (ret)
+ return ret;
+
+ if (*chan_nr < 0 || *chan_nr > cfg->max_channel)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int lp55xx_parse_multi_led_child(struct device_node *child,
+ struct lp55xx_led_config *cfg,
+ int child_number, int color_number)
+{
+ int chan_nr, color_id, ret;
+
+ ret = lp55xx_parse_common_child(child, cfg, child_number, &chan_nr);
+ if (ret)
+ return ret;
+
+ ret = of_property_read_u32(child, "color", &color_id);
+ if (ret)
+ return ret;
+
+ cfg[child_number].color_id[color_number] = color_id;
+ cfg[child_number].output_num[color_number] = chan_nr;
+
+ return 0;
+}
+
+static int lp55xx_parse_multi_led(struct device_node *np,
+ struct lp55xx_led_config *cfg,
+ int child_number)
+{
+ struct device_node *child;
+ int num_colors = 0, ret;
+
+ for_each_child_of_node(np, child) {
+ ret = lp55xx_parse_multi_led_child(child, cfg, child_number,
+ num_colors);
+ if (ret)
+ return ret;
+ num_colors++;
+ }
+
+ cfg[child_number].num_colors = num_colors;
+
+ return 0;
+}
+
+static int lp55xx_parse_logical_led(struct device_node *np,
+ struct lp55xx_led_config *cfg,
+ int child_number)
+{
+ int led_color, ret;
+ int chan_nr = 0;
+
+ cfg[child_number].default_trigger =
+ of_get_property(np, "linux,default-trigger", NULL);
+
+ ret = of_property_read_u32(np, "color", &led_color);
+ if (ret)
+ return ret;
+
+ if (led_color == LED_COLOR_ID_MULTI)
+ return lp55xx_parse_multi_led(np, cfg, child_number);
+
+ ret = lp55xx_parse_common_child(np, cfg, child_number, &chan_nr);
+ if (ret < 0)
+ return ret;
+
+ cfg[child_number].chan_nr = chan_nr;
+
+ return ret;
+}
+
struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev,
- struct device_node *np)
+ struct device_node *np,
+ struct lp55xx_chip *chip)
{
struct device_node *child;
struct lp55xx_platform_data *pdata;
struct lp55xx_led_config *cfg;
int num_channels;
int i = 0;
+ int ret;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
@@ -550,16 +679,12 @@ struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev,
pdata->led_config = &cfg[0];
pdata->num_channels = num_channels;
+ cfg->max_channel = chip->cfg->max_channel;
for_each_child_of_node(np, child) {
- cfg[i].chan_nr = i;
-
- of_property_read_string(child, "chan-name", &cfg[i].name);
- of_property_read_u8(child, "led-cur", &cfg[i].led_current);
- of_property_read_u8(child, "max-cur", &cfg[i].max_current);
- cfg[i].default_trigger =
- of_get_property(child, "linux,default-trigger", NULL);
-
+ ret = lp55xx_parse_logical_led(child, cfg, i);
+ if (ret)
+ return ERR_PTR(-EINVAL);
i++;
}
diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h
index b9b1041e8143..a9d7ba3f2fd1 100644
--- a/drivers/leds/leds-lp55xx-common.h
+++ b/drivers/leds/leds-lp55xx-common.h
@@ -12,6 +12,8 @@
#ifndef _LEDS_LP55XX_COMMON_H
#define _LEDS_LP55XX_COMMON_H
+#include <linux/led-class-multicolor.h>
+
enum lp55xx_engine_index {
LP55XX_ENGINE_INVALID,
LP55XX_ENGINE_1,
@@ -109,6 +111,9 @@ struct lp55xx_device_config {
/* access brightness register */
int (*brightness_fn)(struct lp55xx_led *led);
+ /* perform brightness value to multiple LEDs */
+ int (*multicolor_brightness_fn)(struct lp55xx_led *led);
+
/* current setting function */
void (*set_led_current) (struct lp55xx_led *led, u8 led_current);
@@ -159,6 +164,8 @@ struct lp55xx_chip {
* struct lp55xx_led
* @chan_nr : Channel number
* @cdev : LED class device
+ * @mc_cdev : Multi color class device
+ * @color_components: Multi color LED map information
* @led_current : Current setting at each led channel
* @max_current : Maximun current at each led channel
* @brightness : Brightness value
@@ -167,6 +174,7 @@ struct lp55xx_chip {
struct lp55xx_led {
int chan_nr;
struct led_classdev cdev;
+ struct led_classdev_mc mc_cdev;
u8 led_current;
u8 max_current;
u8 brightness;
@@ -196,6 +204,7 @@ extern void lp55xx_unregister_sysfs(struct lp55xx_chip *chip);
/* common device tree population function */
extern struct lp55xx_platform_data
-*lp55xx_of_populate_pdata(struct device *dev, struct device_node *np);
+*lp55xx_of_populate_pdata(struct device *dev, struct device_node *np,
+ struct lp55xx_chip *chip);
#endif /* _LEDS_LP55XX_COMMON_H */
diff --git a/drivers/leds/leds-lp8501.c b/drivers/leds/leds-lp8501.c
index a58019cdb8c3..ac2c31db4a65 100644
--- a/drivers/leds/leds-lp8501.c
+++ b/drivers/leds/leds-lp8501.c
@@ -308,9 +308,16 @@ static int lp8501_probe(struct i2c_client *client,
struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
struct device_node *np = client->dev.of_node;
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->cfg = &lp8501_cfg;
+
if (!pdata) {
if (np) {
- pdata = lp55xx_of_populate_pdata(&client->dev, np);
+ pdata = lp55xx_of_populate_pdata(&client->dev, np,
+ chip);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
} else {
@@ -319,10 +326,6 @@ static int lp8501_probe(struct i2c_client *client,
}
}
- chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
-
led = devm_kcalloc(&client->dev,
pdata->num_channels, sizeof(*led), GFP_KERNEL);
if (!led)
@@ -330,7 +333,6 @@ static int lp8501_probe(struct i2c_client *client,
chip->cl = client;
chip->pdata = pdata;
- chip->cfg = &lp8501_cfg;
mutex_init(&chip->lock);
diff --git a/include/linux/platform_data/leds-lp55xx.h b/include/linux/platform_data/leds-lp55xx.h
index 96a787100fda..d85275aea38c 100644
--- a/include/linux/platform_data/leds-lp55xx.h
+++ b/include/linux/platform_data/leds-lp55xx.h
@@ -12,17 +12,25 @@
#ifndef _LEDS_LP55XX_H
#define _LEDS_LP55XX_H
+#include <linux/led-class-multicolor.h>
+
/* Clock configuration */
#define LP55XX_CLOCK_AUTO 0
#define LP55XX_CLOCK_INT 1
#define LP55XX_CLOCK_EXT 2
+#define LP55XX_MAX_GROUPED_CHAN 4
+
struct lp55xx_led_config {
const char *name;
const char *default_trigger;
u8 chan_nr;
u8 led_current; /* mA x10, 0 if led is not connected */
u8 max_current;
+ int num_colors;
+ unsigned int max_channel;
+ int color_id[LED_COLOR_ID_MAX];
+ int output_num[LED_COLOR_ID_MAX];
};
struct lp55xx_predef_pattern {
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 14/18] leds: lp5523: Update the lp5523 code to add multicolor brightness function
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (12 preceding siblings ...)
2020-04-02 20:43 ` [PATCH v19 13/18] leds: lp55xx: Add multicolor framework support to lp55xx Dan Murphy
@ 2020-04-02 20:43 ` Dan Murphy
2020-04-02 20:43 ` [PATCH v19 15/18] leds: lp5521: Add multicolor framework multicolor brightness support Dan Murphy
` (3 subsequent siblings)
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:43 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Add the multicolor brightness call back to support the multicolor
framework. This call back allows setting brightness on grouped channels
in a single function.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
drivers/leds/leds-lp5523.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index b076c16df9ab..80d364f237d0 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -791,6 +791,25 @@ static ssize_t store_master_fader_leds(struct device *dev,
return ret;
}
+static int lp5523_multicolor_brightness(struct lp55xx_led *led)
+{
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+ int i;
+
+ mutex_lock(&chip->lock);
+ for (i = 0; i < led->mc_cdev.num_colors; i++) {
+ ret = lp55xx_write(chip,
+ LP5523_REG_LED_PWM_BASE +
+ led->mc_cdev.multicolor_info[i].color_channel,
+ led->mc_cdev.multicolor_info[i].color_brightness);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
static int lp5523_led_brightness(struct lp55xx_led *led)
{
struct lp55xx_chip *chip = led->chip;
@@ -857,6 +876,7 @@ static struct lp55xx_device_config lp5523_cfg = {
.max_channel = LP5523_MAX_LEDS,
.post_init_device = lp5523_post_init_device,
.brightness_fn = lp5523_led_brightness,
+ .multicolor_brightness_fn = lp5523_multicolor_brightness,
.set_led_current = lp5523_set_led_current,
.firmware_cb = lp5523_firmware_loaded,
.run_engine = lp5523_run_engine,
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 15/18] leds: lp5521: Add multicolor framework multicolor brightness support
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (13 preceding siblings ...)
2020-04-02 20:43 ` [PATCH v19 14/18] leds: lp5523: Update the lp5523 code to add multicolor brightness function Dan Murphy
@ 2020-04-02 20:43 ` Dan Murphy
2020-04-02 20:43 ` [PATCH v19 16/18] leds: lp55xx: Fix checkpatch file permissions issues Dan Murphy
` (2 subsequent siblings)
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:43 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Add the multicolor brightness call back to support the multicolor
framework. This function allows setting the brightness across
grouped LED channels in a single call.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
drivers/leds/leds-lp5521.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index 6ff81d6be789..26498d5d3bb3 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -349,6 +349,25 @@ static int lp5521_run_selftest(struct lp55xx_chip *chip, char *buf)
return 0;
}
+static int lp5521_multicolor_brightness(struct lp55xx_led *led)
+{
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+ int i;
+
+ mutex_lock(&chip->lock);
+ for (i = 0; i < led->mc_cdev.num_colors; i++) {
+ ret = lp55xx_write(chip,
+ LP5521_REG_LED_PWM_BASE +
+ led->mc_cdev.multicolor_info[i].color_channel,
+ led->mc_cdev.multicolor_info[i].color_brightness);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
static int lp5521_led_brightness(struct lp55xx_led *led)
{
struct lp55xx_chip *chip = led->chip;
@@ -490,6 +509,7 @@ static struct lp55xx_device_config lp5521_cfg = {
.max_channel = LP5521_MAX_LEDS,
.post_init_device = lp5521_post_init_device,
.brightness_fn = lp5521_led_brightness,
+ .multicolor_brightness_fn = lp5521_multicolor_brightness,
.set_led_current = lp5521_set_led_current,
.firmware_cb = lp5521_firmware_loaded,
.run_engine = lp5521_run_engine,
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 16/18] leds: lp55xx: Fix checkpatch file permissions issues
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (14 preceding siblings ...)
2020-04-02 20:43 ` [PATCH v19 15/18] leds: lp5521: Add multicolor framework multicolor brightness support Dan Murphy
@ 2020-04-02 20:43 ` Dan Murphy
2020-04-02 20:43 ` [PATCH v19 17/18] leds: lp5523: Fix checkpatch issues in the code Dan Murphy
2020-04-02 20:43 ` [PATCH v19 18/18] dt: bindings: Update lp55xx binding to recommended LED naming Dan Murphy
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:43 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Fix the checkpatch warnings for the use of the file permission macros.
In converting the file permissions to the DEVICE_ATTR_XX macros the
call back function names needed to be updated within the code.
This means that the lp55xx_ needed to be dropped in the name to keep in
harmony with the ABI documentation.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
---
drivers/leds/leds-lp55xx-common.c | 22 ++++++++++------------
1 file changed, 10 insertions(+), 12 deletions(-)
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
index 74f90b670811..a154dd579741 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -83,7 +83,7 @@ static int lp55xx_post_init_device(struct lp55xx_chip *chip)
return cfg->post_init_device(chip);
}
-static ssize_t lp55xx_show_current(struct device *dev,
+static ssize_t led_current_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
@@ -92,7 +92,7 @@ static ssize_t lp55xx_show_current(struct device *dev,
return scnprintf(buf, PAGE_SIZE, "%d\n", led->led_current);
}
-static ssize_t lp55xx_store_current(struct device *dev,
+static ssize_t led_current_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
@@ -116,7 +116,7 @@ static ssize_t lp55xx_store_current(struct device *dev,
return len;
}
-static ssize_t lp55xx_show_max_current(struct device *dev,
+static ssize_t max_current_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
@@ -125,9 +125,8 @@ static ssize_t lp55xx_show_max_current(struct device *dev,
return scnprintf(buf, PAGE_SIZE, "%d\n", led->max_current);
}
-static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, lp55xx_show_current,
- lp55xx_store_current);
-static DEVICE_ATTR(max_current, S_IRUGO , lp55xx_show_max_current, NULL);
+static DEVICE_ATTR_RW(led_current);
+static DEVICE_ATTR_RO(max_current);
static struct attribute *lp55xx_led_attrs[] = {
&dev_attr_led_current.attr,
@@ -263,7 +262,7 @@ static int lp55xx_request_firmware(struct lp55xx_chip *chip)
GFP_KERNEL, chip, lp55xx_firmware_loaded);
}
-static ssize_t lp55xx_show_engine_select(struct device *dev,
+static ssize_t select_engine_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
@@ -273,7 +272,7 @@ static ssize_t lp55xx_show_engine_select(struct device *dev,
return sprintf(buf, "%d\n", chip->engine_idx);
}
-static ssize_t lp55xx_store_engine_select(struct device *dev,
+static ssize_t select_engine_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
@@ -315,7 +314,7 @@ static inline void lp55xx_run_engine(struct lp55xx_chip *chip, bool start)
chip->cfg->run_engine(chip, start);
}
-static ssize_t lp55xx_store_engine_run(struct device *dev,
+static ssize_t run_engine_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
@@ -340,9 +339,8 @@ static ssize_t lp55xx_store_engine_run(struct device *dev,
return len;
}
-static DEVICE_ATTR(select_engine, S_IRUGO | S_IWUSR,
- lp55xx_show_engine_select, lp55xx_store_engine_select);
-static DEVICE_ATTR(run_engine, S_IWUSR, NULL, lp55xx_store_engine_run);
+static DEVICE_ATTR_RW(select_engine);
+static DEVICE_ATTR_WO(run_engine);
static struct attribute *lp55xx_engine_attributes[] = {
&dev_attr_select_engine.attr,
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 17/18] leds: lp5523: Fix checkpatch issues in the code
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (15 preceding siblings ...)
2020-04-02 20:43 ` [PATCH v19 16/18] leds: lp55xx: Fix checkpatch file permissions issues Dan Murphy
@ 2020-04-02 20:43 ` Dan Murphy
2020-04-02 20:43 ` [PATCH v19 18/18] dt: bindings: Update lp55xx binding to recommended LED naming Dan Murphy
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:43 UTC (permalink / raw)
To: jacek.anaszewski, pavel; +Cc: linux-leds, linux-kernel, Dan Murphy
Fix checkpatch errors and warnings for the LP5523.c device
driver.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
---
drivers/leds/leds-lp5523.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index 80d364f237d0..8ce278348495 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -23,13 +23,13 @@
#define LP5523_PROGRAM_LENGTH 32 /* bytes */
/* Memory is used like this:
- 0x00 engine 1 program
- 0x10 engine 2 program
- 0x20 engine 3 program
- 0x30 engine 1 muxing info
- 0x40 engine 2 muxing info
- 0x50 engine 3 muxing info
-*/
+ * 0x00 engine 1 program
+ * 0x10 engine 2 program
+ * 0x20 engine 3 program
+ * 0x30 engine 1 muxing info
+ * 0x40 engine 2 muxing info
+ * 0x50 engine 3 muxing info
+ */
#define LP5523_MAX_LEDS 9
/* Registers */
@@ -326,7 +326,7 @@ static int lp5523_update_program_memory(struct lp55xx_chip *chip,
const u8 *data, size_t size)
{
u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
- unsigned cmd;
+ unsigned int cmd;
char c[3];
int nrchars;
int ret;
@@ -468,6 +468,7 @@ static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
static void lp5523_mux_to_array(u16 led_mux, char *array)
{
int i, pos = 0;
+
for (i = 0; i < LP5523_MAX_LEDS; i++)
pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
@@ -506,7 +507,7 @@ static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr)
if (ret)
return ret;
- ret = lp55xx_write(chip, LP5523_REG_PROG_MEM , (u8)(mux >> 8));
+ ret = lp55xx_write(chip, LP5523_REG_PROG_MEM, (u8)(mux >> 8));
if (ret)
return ret;
--
2.25.1
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v19 18/18] dt: bindings: Update lp55xx binding to recommended LED naming
2020-04-02 20:42 [PATCH v19 00/18] Multicolor Framework (array edition) Dan Murphy
` (16 preceding siblings ...)
2020-04-02 20:43 ` [PATCH v19 17/18] leds: lp5523: Fix checkpatch issues in the code Dan Murphy
@ 2020-04-02 20:43 ` Dan Murphy
17 siblings, 0 replies; 36+ messages in thread
From: Dan Murphy @ 2020-04-02 20:43 UTC (permalink / raw)
To: jacek.anaszewski, pavel
Cc: linux-leds, linux-kernel, Dan Murphy, Rob Herring, Tony Lindgren,
Benoît Cousson, Linus Walleij, Shawn Guo, Sascha Hauer,
Pengutronix Kernel Team, Fabio Estevam, NXP Linux Team
Update the LP55xx DT binding examples to the recommended node
naming convention. There are no changes to the DT properties.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
CC: Rob Herring <robh+dt@kernel.org>
CC: Tony Lindgren <tony@atomide.com>
CC: "Benoît Cousson" <bcousson@baylibre.com>
CC: Linus Walleij <linus.walleij@linaro.org>
CC: Shawn Guo <shawnguo@kernel.org>
CC: Sascha Hauer <s.hauer@pengutronix.de>
CC: Pengutronix Kernel Team <kernel@pengutronix.de>
CC: Fabio Estevam <festevam@gmail.com>
CC: NXP Linux Team <linux-imx@nxp.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
---
.../devicetree/bindings/leds/leds-lp55xx.txt | 58 +++++++++----------
1 file changed, 29 insertions(+), 29 deletions(-)
diff --git a/Documentation/devicetree/bindings/leds/leds-lp55xx.txt b/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
index 0ccc1efc2499..5475f45ef51f 100644
--- a/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
+++ b/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
@@ -48,7 +48,7 @@ example 1) LP5521
'lp5521_pri:channel1' and 'lp5521_pri:channel2', with a heartbeat trigger
on channel 0.
-lp5521@32 {
+led-controller@32 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "national,lp5521";
@@ -56,20 +56,20 @@ lp5521@32 {
label = "lp5521_pri";
clock-mode = /bits/ 8 <2>;
- chan@0 {
+ led@0 {
reg = <0>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
linux,default-trigger = "heartbeat";
};
- chan@1 {
+ led@1 {
reg = <1>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
};
- chan@2 {
+ led@2 {
reg = <2>;
led-cur = /bits/ 8 <0x2f>;
max-cur = /bits/ 8 <0x5f>;
@@ -88,70 +88,70 @@ ASEL1 ASEL0 Address
VEN GND 34h
VEN VEN 35h
-lp5523@32 {
+led-controller@32 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "national,lp5523";
reg = <0x32>;
clock-mode = /bits/ 8 <1>;
- chan@0 {
+ led@0 {
reg = <0>;
chan-name = "d1";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@1 {
+ led@1 {
reg = <1>;
chan-name = "d2";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@2 {
+ led@2 {
reg = <2>;
chan-name = "d3";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@3 {
+ led@3 {
reg = <3>;
chan-name = "d4";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@4 {
+ led@4 {
reg = <4>;
chan-name = "d5";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@5 {
+ led@5 {
reg = <5>;
chan-name = "d6";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@6 {
+ led@6 {
reg = <6>;
chan-name = "d7";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@7 {
+ led@7 {
reg = <7>;
chan-name = "d8";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@8 {
+ led@8 {
reg = <8>;
chan-name = "d9";
led-cur = /bits/ 8 <0x14>;
@@ -162,35 +162,35 @@ lp5523@32 {
example 3) LP5562
4 channels are defined.
-lp5562@30 {
+led-controller@30 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "ti,lp5562";
reg = <0x30>;
clock-mode = /bits/8 <2>;
- chan@0 {
+ led@0 {
reg = <0>;
chan-name = "R";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
};
- chan@1 {
+ led@1 {
reg = <1>;
chan-name = "G";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
};
- chan@2 {
+ led@2 {
reg = <2>;
chan-name = "B";
led-cur = /bits/ 8 <0x20>;
max-cur = /bits/ 8 <0x60>;
};
- chan@3 {
+ led@3 {
reg = <3>;
chan-name = "W";
led-cur = /bits/ 8 <0x20>;
@@ -202,7 +202,7 @@ example 4) LP8501
9 channels are defined. The 'pwr-sel' is LP8501 specific property.
Others are same as LP5523.
-lp8501@32 {
+led-controller@32 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "ti,lp8501";
@@ -210,63 +210,63 @@ lp8501@32 {
clock-mode = /bits/ 8 <2>;
pwr-sel = /bits/ 8 <3>; /* D1~9 connected to VOUT */
- chan@0 {
+ led@0 {
reg = <0>;
chan-name = "d1";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@1 {
+ led@1 {
reg = <1>;
chan-name = "d2";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@2 {
+ led@2 {
reg = <2>;
chan-name = "d3";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@3 {
+ led@3 {
reg = <3>;
chan-name = "d4";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@4 {
+ led@4 {
reg = <4>;
chan-name = "d5";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@5 {
+ led@5 {
reg = <5>;
chan-name = "d6";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@6 {
+ led@6 {
reg = <6>;
chan-name = "d7";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@7 {
+ led@7 {
reg = <7>;
chan-name = "d8";
led-cur = /bits/ 8 <0x14>;
max-cur = /bits/ 8 <0x20>;
};
- chan@8 {
+ led@8 {
reg = <8>;
chan-name = "d9";
led-cur = /bits/ 8 <0x14>;
--
2.25.1
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